diff --git a/src/main/java/org/apache/commons/collections4/ArrayUtils.java b/src/main/java/org/apache/commons/collections4/ArrayUtils.java
index 61cbb4821..e997a12f5 100644
--- a/src/main/java/org/apache/commons/collections4/ArrayUtils.java
+++ b/src/main/java/org/apache/commons/collections4/ArrayUtils.java
@@ -37,7 +37,6 @@ package org.apache.commons.collections4;
  */
 final class ArrayUtils {
 
-
     /**
      * Don't allow instances.
      */
diff --git a/src/main/java/org/apache/commons/collections4/CollectionUtils.java b/src/main/java/org/apache/commons/collections4/CollectionUtils.java
index 97e187b71..3ae1da873 100644
--- a/src/main/java/org/apache/commons/collections4/CollectionUtils.java
+++ b/src/main/java/org/apache/commons/collections4/CollectionUtils.java
@@ -1795,7 +1795,6 @@ public class CollectionUtils {
         return mergedList;
     }
 
-
     /**
      * Returns a {@link Collection} of all the permutations of the input collection.
      * <p>
diff --git a/src/main/java/org/apache/commons/collections4/ListUtils.java b/src/main/java/org/apache/commons/collections4/ListUtils.java
index 054c070a2..f7eb95c5e 100644
--- a/src/main/java/org/apache/commons/collections4/ListUtils.java
+++ b/src/main/java/org/apache/commons/collections4/ListUtils.java
@@ -63,7 +63,6 @@ public class ListUtils {
         }
     }
 
-
     /**
      * A helper class used to construct the longest common subsequence.
      */
diff --git a/src/main/java/org/apache/commons/collections4/QueueUtils.java b/src/main/java/org/apache/commons/collections4/QueueUtils.java
index 79ed44dcc..1cdb18d37 100644
--- a/src/main/java/org/apache/commons/collections4/QueueUtils.java
+++ b/src/main/java/org/apache/commons/collections4/QueueUtils.java
@@ -42,7 +42,6 @@ public class QueueUtils {
      */
     private QueueUtils() {}
 
-
     /**
      * Returns a synchronized (thread-safe) queue backed by the given queue.
      * In order to guarantee serial access, it is critical that all access to the
diff --git a/src/main/java/org/apache/commons/collections4/SetUtils.java b/src/main/java/org/apache/commons/collections4/SetUtils.java
index 6d7bcd622..a9269952a 100644
--- a/src/main/java/org/apache/commons/collections4/SetUtils.java
+++ b/src/main/java/org/apache/commons/collections4/SetUtils.java
@@ -198,7 +198,6 @@ public class SetUtils {
         return set == null ? Collections.<T>emptySet() : set;
     }
 
-
     /**
      * Gets a typed empty unmodifiable Set.
      * @param <E> the element type
diff --git a/src/main/java/org/apache/commons/collections4/SplitMapUtils.java b/src/main/java/org/apache/commons/collections4/SplitMapUtils.java
index b1bf9bcaf..4e8cceadd 100644
--- a/src/main/java/org/apache/commons/collections4/SplitMapUtils.java
+++ b/src/main/java/org/apache/commons/collections4/SplitMapUtils.java
@@ -43,7 +43,6 @@ public class SplitMapUtils {
      */
     private SplitMapUtils() {}
 
-
     private static final class WrappedGet<K, V> implements IterableMap<K, V>, Unmodifiable {
         private final Get<K, V> get;
 
@@ -218,7 +217,6 @@ public class SplitMapUtils {
         }
     }
 
-
     /**
      * Gets the specified {@link Get} as an instance of {@link IterableMap}.
      * If {@code get} implements {@link IterableMap} directly, no conversion will take place.
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java b/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
index c971469b3..f9e09f0f7 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
@@ -73,7 +73,6 @@ public abstract class AbstractBagDecorator<E>
         return decorated().hashCode();
     }
 
-
     @Override
     public int getCount(final Object object) {
         return decorated().getCount(object);
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java b/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
index 3c429dfbc..dbd319f25 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
@@ -62,7 +62,6 @@ public abstract class AbstractSortedBagDecorator<E>
         return (SortedBag<E>) super.decorated();
     }
 
-
     @Override
     public E first() {
         return decorated().first();
diff --git a/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java b/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
index 485bc5ec9..d30e34734 100644
--- a/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
@@ -101,7 +101,6 @@ public class PredicatedBag<E> extends PredicatedCollection<E> implements Bag<E>
         return decorated().hashCode();
     }
 
-
     @Override
     public boolean add(final E object, final int count) {
         validate(object);
diff --git a/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
index a56e239eb..ebbc09899 100644
--- a/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
@@ -89,7 +89,6 @@ public class PredicatedSortedBag<E> extends PredicatedBag<E> implements SortedBa
         return (SortedBag<E>) super.decorated();
     }
 
-
     @Override
     public E first() {
         return decorated().first();
diff --git a/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java b/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
index 3420f4ddf..91f882240 100644
--- a/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
@@ -100,7 +100,6 @@ public class SynchronizedBag<E> extends SynchronizedCollection<E> implements Bag
         }
     }
 
-
     @Override
     public boolean add(final E object, final int count) {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
index 3c226ebfd..9aaeda2a3 100644
--- a/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
@@ -83,7 +83,6 @@ public class SynchronizedSortedBag<E> extends SynchronizedBag<E> implements Sort
         return (SortedBag<E>) decorated();
     }
 
-
     @Override
     public synchronized E first() {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java b/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
index 7c5bed3e5..755b10eea 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
@@ -121,7 +121,6 @@ public class TransformedBag<E> extends TransformedCollection<E> implements Bag<E
         return decorated().hashCode();
     }
 
-
     @Override
     public int getCount(final Object object) {
         return getBag().getCount(object);
@@ -132,7 +131,6 @@ public class TransformedBag<E> extends TransformedCollection<E> implements Bag<E
         return getBag().remove(object, nCopies);
     }
 
-
     @Override
     public boolean add(final E object, final int nCopies) {
         return getBag().add(transform(object), nCopies);
diff --git a/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
index cd192db53..8b7d16c12 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
@@ -112,7 +112,6 @@ public class TransformedSortedBag<E> extends TransformedBag<E> implements Sorted
         return (SortedBag<E>) decorated();
     }
 
-
     @Override
     public E first() {
         return getSortedBag().first();
diff --git a/src/main/java/org/apache/commons/collections4/bag/TreeBag.java b/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
index 421b49d3a..c1905a29b 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
@@ -95,7 +95,6 @@ public class TreeBag<E> extends AbstractMapBag<E> implements SortedBag<E>, Seria
         return super.add(object);
     }
 
-
     @Override
     public E first() {
         return getMap().firstKey();
diff --git a/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java b/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java
index 0c38a97d4..c5becd8d6 100644
--- a/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java
+++ b/src/main/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap.java
@@ -130,7 +130,6 @@ public class DualTreeBidiMap<K, V> extends AbstractDualBidiMap<K, V>
         return new DualTreeBidiMap<>(normalMap, reverseMap, inverseMap);
     }
 
-
     @Override
     public Comparator<? super K> comparator() {
         return ((SortedMap<K, V>) normalMap).comparator();
@@ -205,7 +204,6 @@ public class DualTreeBidiMap<K, V> extends AbstractDualBidiMap<K, V>
         return inverseBidiMap();
     }
 
-
     @Override
     public SortedMap<K, V> headMap(final K toKey) {
         final SortedMap<K, V> sub = ((SortedMap<K, V>) normalMap).headMap(toKey);
diff --git a/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java b/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java
index c6e46fe5e..ec02fc8e9 100644
--- a/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java
+++ b/src/main/java/org/apache/commons/collections4/bidimap/TreeBidiMap.java
@@ -672,7 +672,6 @@ public class TreeBidiMap<K extends Comparable<K>, V extends Comparable<V>>
         return rval;
     }
 
-
     /**
      * Compares two objects.
      *
diff --git a/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java b/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java
index 13fc7588d..b94652841 100644
--- a/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/collection/AbstractCollectionDecorator.java
@@ -103,7 +103,6 @@ public abstract class AbstractCollectionDecorator<E>
         this.collection = coll;
     }
 
-
     @Override
     public boolean add(final E object) {
         return decorated().add(object);
diff --git a/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java b/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java
index 97544b51c..065232f26 100644
--- a/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java
+++ b/src/main/java/org/apache/commons/collections4/collection/IndexedCollection.java
@@ -257,7 +257,6 @@ public class IndexedCollection<K, C> extends AbstractCollectionDecorator<C> {
         return changed;
     }
 
-
     /**
      * Provides checking for adding the index.
      *
diff --git a/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java b/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java
index 399221690..25b69551c 100644
--- a/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java
+++ b/src/main/java/org/apache/commons/collections4/collection/SynchronizedCollection.java
@@ -96,7 +96,6 @@ public class SynchronizedCollection<E> implements Collection<E>, Serializable {
         return collection;
     }
 
-
     @Override
     public boolean add(final E object) {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java b/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java
index 44ddcbfdb..609cf9407 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/AbstractListIteratorDecorator.java
@@ -52,7 +52,6 @@ public class AbstractListIteratorDecorator<E> implements ListIterator<E> {
         return iterator;
     }
 
-
     /** {@inheritDoc} */
     @Override
     public boolean hasNext() {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java b/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java
index 1d8583ba8..192d668d4 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/AbstractMapIteratorDecorator.java
@@ -53,7 +53,6 @@ public class AbstractMapIteratorDecorator<K, V> implements MapIterator<K, V> {
         return iterator;
     }
 
-
     /** {@inheritDoc} */
     @Override
     public boolean hasNext() {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java b/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java
index 5738ac194..1a8e9f7bf 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/AbstractOrderedMapIteratorDecorator.java
@@ -53,7 +53,6 @@ public class AbstractOrderedMapIteratorDecorator<K, V> implements OrderedMapIter
         return iterator;
     }
 
-
     /** {@inheritDoc} */
     @Override
     public boolean hasNext() {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java b/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
index cf1915d13..1b4b786a3 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
@@ -49,7 +49,6 @@ public class BoundedIterator<E> implements Iterator<E> {
     /** The position of the current element */
     private long pos;
 
-
     /**
      * Decorates the specified iterator to return at most the given number of elements,
      * skipping all elements until the iterator reaches the position at {@code offset}.
@@ -88,7 +87,6 @@ public class BoundedIterator<E> implements Iterator<E> {
         }
     }
 
-
     @Override
     public boolean hasNext() {
         if (!checkBounds()) {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
index 7bf975a27..0b2b4e123 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
@@ -27,7 +27,6 @@ import java.util.Objects;
 
 import org.apache.commons.collections4.list.UnmodifiableList;
 
-
 /**
  * Provides an ordered iteration over the elements contained in a collection of
  * ordered Iterators.
diff --git a/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java b/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java
index 94811a9b1..4aa37815b 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/LazyIteratorChain.java
@@ -63,7 +63,6 @@ public abstract class LazyIteratorChain<E> implements Iterator<E> {
      */
     private Iterator<? extends E> lastUsedIterator;
 
-
     /**
      * Gets the next iterator after the previous one has been exhausted.
      * <p>
@@ -100,7 +99,6 @@ public abstract class LazyIteratorChain<E> implements Iterator<E> {
         }
     }
 
-
     /**
      * Return true if any Iterator in the chain has a remaining element.
      *
diff --git a/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
index ce38757eb..7a37bd9d2 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
@@ -64,7 +64,6 @@ public class PeekingIterator<E> implements Iterator<E> {
         return new PeekingIterator<>(iterator);
     }
 
-
     /**
      * Constructor.
      *
diff --git a/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java b/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
index 467a82107..b8b5efdc9 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
@@ -61,7 +61,6 @@ public class PushbackIterator<E> implements Iterator<E> {
         return new PushbackIterator<>(iterator);
     }
 
-
     /**
      * Constructor.
      *
diff --git a/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
index 857c52d3c..b3ace8563 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
@@ -37,7 +37,6 @@ public class SkippingIterator<E> extends AbstractIteratorDecorator<E> {
     /** The position of the current element */
     private long pos;
 
-
     /**
      * Decorates the specified iterator to skip all elements until the iterator
      * reaches the position at {@code offset}.
@@ -71,7 +70,6 @@ public class SkippingIterator<E> extends AbstractIteratorDecorator<E> {
         }
     }
 
-
     @Override
     public E next() {
         final E next = super.next();
diff --git a/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java b/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java
index 1cdd37ad1..09d9fe18b 100644
--- a/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/keyvalue/AbstractMapEntryDecorator.java
@@ -53,7 +53,6 @@ public abstract class AbstractMapEntryDecorator<K, V> implements Map.Entry<K, V>
         return entry;
     }
 
-
     @Override
     public K getKey() {
         return entry.getKey();
diff --git a/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java b/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java
index 2c39bf5c4..514eef693 100644
--- a/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java
+++ b/src/main/java/org/apache/commons/collections4/keyvalue/MultiKey.java
@@ -131,7 +131,6 @@ public class MultiKey<K> implements Serializable {
         this(newArray(key1, key2), false);
     }
 
-
     /**
      * Constructor taking three keys.
      * <p>
diff --git a/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java b/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java
index ce1b539a7..83267b6be 100644
--- a/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java
+++ b/src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java
@@ -99,7 +99,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         header = createHeaderNode();
     }
 
-
     @Override
     public int size() {
         return size;
@@ -116,7 +115,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         return node.getValue();
     }
 
-
     @Override
     public Iterator<E> iterator() {
         return listIterator();
@@ -132,7 +130,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         return new LinkedListIterator<>(this, fromIndex);
     }
 
-
     @Override
     public int indexOf(final Object value) {
         int i = 0;
@@ -172,7 +169,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         return true;
     }
 
-
     @Override
     public Object[] toArray() {
         return toArray(new Object[size]);
@@ -210,7 +206,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         return new LinkedSubList<>(this, fromIndexInclusive, toIndexExclusive);
     }
 
-
     @Override
     public boolean add(final E value) {
         addLast(value);
@@ -237,7 +232,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         return true;
     }
 
-
     @Override
     public E remove(final int index) {
         final Node<E> node = getNode(index, false);
@@ -279,7 +273,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         return modified;
     }
 
-
     /**
      * {@inheritDoc}
      * <p>
@@ -315,7 +308,6 @@ public abstract class AbstractLinkedList<E> implements List<E> {
         removeAllNodes();
     }
 
-
     public E getFirst() {
         final Node<E> node = header.next;
         if (node == header) {
diff --git a/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java b/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java
index 6c8d46945..23ee15065 100644
--- a/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/list/AbstractListDecorator.java
@@ -74,7 +74,6 @@ public abstract class AbstractListDecorator<E> extends AbstractCollectionDecorat
         return decorated().hashCode();
     }
 
-
     @Override
     public void add(final int index, final E object) {
         decorated().add(index, object);
diff --git a/src/main/java/org/apache/commons/collections4/list/PredicatedList.java b/src/main/java/org/apache/commons/collections4/list/PredicatedList.java
index fa2299136..7a64c8d9f 100644
--- a/src/main/java/org/apache/commons/collections4/list/PredicatedList.java
+++ b/src/main/java/org/apache/commons/collections4/list/PredicatedList.java
@@ -105,7 +105,6 @@ public class PredicatedList<E> extends PredicatedCollection<E> implements List<E
         return decorated().hashCode();
     }
 
-
     @Override
     public E get(final int index) {
         return decorated().get(index);
@@ -126,7 +125,6 @@ public class PredicatedList<E> extends PredicatedCollection<E> implements List<E
         return decorated().remove(index);
     }
 
-
     @Override
     public void add(final int index, final E object) {
         validate(object);
diff --git a/src/main/java/org/apache/commons/collections4/list/TransformedList.java b/src/main/java/org/apache/commons/collections4/list/TransformedList.java
index 8631e8eee..a55c9a2ef 100644
--- a/src/main/java/org/apache/commons/collections4/list/TransformedList.java
+++ b/src/main/java/org/apache/commons/collections4/list/TransformedList.java
@@ -124,7 +124,6 @@ public class TransformedList<E> extends TransformedCollection<E> implements List
         return decorated().hashCode();
     }
 
-
     @Override
     public E get(final int index) {
         return getList().get(index);
@@ -145,7 +144,6 @@ public class TransformedList<E> extends TransformedCollection<E> implements List
         return getList().remove(index);
     }
 
-
     @Override
     public void add(final int index, E object) {
         object = transform(object);
diff --git a/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java b/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
index 711e3bd04..fc4dbad10 100644
--- a/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
+++ b/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
@@ -255,7 +255,6 @@ public abstract class AbstractReferenceMap<K, V> extends AbstractHashedMap<K, V>
         return entry.getValue();
     }
 
-
     /**
      * Puts a key-value mapping into this map.
      * Neither the key nor the value may be null.
diff --git a/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java b/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java
index 2f6bb707e..a1a273e55 100644
--- a/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java
+++ b/src/main/java/org/apache/commons/collections4/map/StaticBucketMap.java
@@ -657,7 +657,6 @@ public final class StaticBucketMap<K, V> extends AbstractIterableMap<K, V> {
 
     }
 
-
     private final class Values extends AbstractCollection<V> {
 
         @Override
diff --git a/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java b/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java
index c06098544..08795a850 100644
--- a/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/multiset/AbstractMultiSetDecorator.java
@@ -72,7 +72,6 @@ public abstract class AbstractMultiSetDecorator<E>
         return decorated().hashCode();
     }
 
-
     @Override
     public int getCount(final Object object) {
         return decorated().getCount(object);
diff --git a/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java b/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java
index 668a9db93..c7e55ce27 100644
--- a/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java
+++ b/src/main/java/org/apache/commons/collections4/multiset/PredicatedMultiSet.java
@@ -101,7 +101,6 @@ public class PredicatedMultiSet<E> extends PredicatedCollection<E> implements Mu
         return decorated().hashCode();
     }
 
-
     @Override
     public int add(final E object, final int count) {
         validate(object);
diff --git a/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java b/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java
index f522897ca..0093f6af1 100644
--- a/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java
+++ b/src/main/java/org/apache/commons/collections4/multiset/SynchronizedMultiSet.java
@@ -97,7 +97,6 @@ public class SynchronizedMultiSet<E> extends SynchronizedCollection<E> implement
         }
     }
 
-
     @Override
     public int add(final E object, final int count) {
         synchronized (lock) {
diff --git a/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java b/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java
index 6ffebdaa8..aa916951f 100644
--- a/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/queue/AbstractQueueDecorator.java
@@ -68,7 +68,6 @@ public abstract class AbstractQueueDecorator<E> extends AbstractCollectionDecora
         return (Queue<E>) super.decorated();
     }
 
-
     @Override
     public boolean offer(final E obj) {
         return decorated().offer(obj);
diff --git a/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java b/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java
index f79fc111e..a96b86c6f 100644
--- a/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/CircularFifoQueue.java
@@ -272,7 +272,6 @@ public class CircularFifoQueue<E> extends AbstractCollection<E>
         return elements[idx];
     }
 
-
     /**
      * Adds the given element to this queue. If the queue is full, the least recently added
      * element is discarded so that a new element can be inserted.
diff --git a/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java b/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java
index b5b031a47..8d8f51f2f 100644
--- a/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/PredicatedQueue.java
@@ -85,7 +85,6 @@ public class PredicatedQueue<E> extends PredicatedCollection<E> implements Queue
         return (Queue<E>) super.decorated();
     }
 
-
     /**
      * Override to validate the object being added to ensure it matches
      * the predicate.
diff --git a/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java b/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java
index 710a25621..e716fd8ef 100644
--- a/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/TransformedQueue.java
@@ -109,7 +109,6 @@ public class TransformedQueue<E> extends TransformedCollection<E> implements Que
         return (Queue<E>) decorated();
     }
 
-
     @Override
     public boolean offer(final E obj) {
         return getQueue().offer(transform(obj));
diff --git a/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java b/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java
index c8dc50973..219e9d774 100644
--- a/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java
+++ b/src/main/java/org/apache/commons/collections4/queue/UnmodifiableQueue.java
@@ -140,7 +140,6 @@ public final class UnmodifiableQueue<E>
         throw new UnsupportedOperationException();
     }
 
-
     @Override
     public boolean offer(final E obj) {
         throw new UnsupportedOperationException();
diff --git a/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java b/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java
index 4ada1916e..83a7f72c8 100644
--- a/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java
+++ b/src/main/java/org/apache/commons/collections4/sequence/SequencesComparator.java
@@ -237,7 +237,6 @@ public class SequencesComparator<T> {
         throw new IllegalStateException("Internal Error");
     }
 
-
     /**
      * Build an edit script.
      *
diff --git a/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java b/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java
index 92f13d2fd..0017579f8 100644
--- a/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/set/AbstractNavigableSetDecorator.java
@@ -61,7 +61,6 @@ public abstract class AbstractNavigableSetDecorator<E>
         return (NavigableSet<E>) super.decorated();
     }
 
-
     @Override
     public E lower(final E e) {
         return decorated().lower(e);
diff --git a/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java b/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java
index d27477216..c0422264e 100644
--- a/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java
+++ b/src/main/java/org/apache/commons/collections4/set/PredicatedNavigableSet.java
@@ -90,7 +90,6 @@ public class PredicatedNavigableSet<E> extends PredicatedSortedSet<E> implements
         return (NavigableSet<E>) super.decorated();
     }
 
-
     @Override
     public E lower(final E e) {
         return decorated().lower(e);
diff --git a/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java b/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java
index 82f0740e8..b92937c04 100644
--- a/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java
+++ b/src/main/java/org/apache/commons/collections4/set/TransformedNavigableSet.java
@@ -110,7 +110,6 @@ public class TransformedNavigableSet<E> extends TransformedSortedSet<E> implemen
         return (NavigableSet<E>) super.decorated();
     }
 
-
     @Override
     public E lower(final E e) {
         return decorated().lower(e);
diff --git a/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java b/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java
index 62ab39f4f..af2c7eb9d 100644
--- a/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java
+++ b/src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java
@@ -769,7 +769,6 @@ public abstract class AbstractPatriciaTrie<K, V> extends AbstractBitwiseTrie<K,
         }
     }
 
-
     @Override
     public Comparator<? super K> comparator() {
         return getKeyAnalyzer();
@@ -1387,7 +1386,6 @@ public abstract class AbstractPatriciaTrie<K, V> extends AbstractBitwiseTrie<K,
         }
     }
 
-
     /**
      * This is an entry set view of the {@link org.apache.commons.collections4.Trie} as returned by {@link Map#entrySet()}.
      */
@@ -2418,7 +2416,6 @@ public abstract class AbstractPatriciaTrie<K, V> extends AbstractBitwiseTrie<K,
         }
     }
 
-
     /**
      * Reads the content of the stream.
      */
diff --git a/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java b/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java
index 6ea3af0f6..70636a8f4 100644
--- a/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java
+++ b/src/main/java/org/apache/commons/collections4/trie/UnmodifiableTrie.java
@@ -74,7 +74,6 @@ public class UnmodifiableTrie<K, V> implements Trie<K, V>, Serializable, Unmodif
         this.delegate = tmpTrie;
     }
 
-
     @Override
     public Set<Entry<K, V>> entrySet() {
         return Collections.unmodifiableSet(delegate.entrySet());
diff --git a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
index 2f8083aed..b632a5724 100644
--- a/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/MapUtilsTest.java
@@ -1016,7 +1016,6 @@ public class MapUtilsTest {
         assertEquals(1.0, MapUtils.getDouble(in, "noKey", 1.0), 0);
         assertEquals(1.0, MapUtils.getDouble(in, "noKey", key -> 1.0), 0);
 
-
         final Map<String, String> inStr = new HashMap<>();
         final char decimalSeparator = getDecimalSeparator();
         inStr.put("str1", "2" + decimalSeparator + "0");
@@ -1127,7 +1126,6 @@ public class MapUtilsTest {
         assertEquals(val, MapUtils.getByte(in, "noKey", val), 0);
         assertEquals(val, MapUtils.getByte(in, "noKey", key -> val), 0);
 
-
         final Map<String, String> inStr = new HashMap<>();
         inStr.put("str1", "100");
 
diff --git a/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java b/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java
index 6a8cc3cc2..ec6ab5729 100644
--- a/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java
+++ b/src/test/java/org/apache/commons/collections4/TrieUtilsTest.java
@@ -41,4 +41,3 @@ public class TrieUtilsTest {
 
 }
 
-
diff --git a/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java
index 88f6cbc4e..e4f66f946 100644
--- a/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/AbstractSortedBagTest.java
@@ -99,7 +99,6 @@ public abstract class AbstractSortedBagTest<T> extends AbstractBagTest<T> {
         return new TreeBag<>();
     }
 
-
     @Override
     public void resetEmpty() {
         this.setCollection(CollectionSortedBag.collectionSortedBag(makeObject()));
@@ -149,6 +148,5 @@ public abstract class AbstractSortedBagTest<T> extends AbstractBagTest<T> {
         return (SortedBag<T>) super.getCollection();
     }
 
-
     // TODO: Add the SortedBag tests!
 }
diff --git a/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java b/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
index d88cb8126..2fa2d8634 100644
--- a/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/CollectionBagTest.java
@@ -46,7 +46,6 @@ public class CollectionBagTest<T> extends AbstractCollectionTest<T> {
         super(CollectionBagTest.class.getSimpleName());
     }
 
-
     @Override
     public Bag<T> makeObject() {
         return CollectionBag.collectionBag(new HashBag<>());
@@ -91,7 +90,6 @@ public class CollectionBagTest<T> extends AbstractCollectionTest<T> {
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/CollectionBag.fullCollection.version4.obj");
 //    }
 
-
     /**
      * Compares the current serialized form of the Bag
      * against the canonical version in SCM.
diff --git a/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
index e65c2db8d..5861a9a42 100644
--- a/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/CollectionSortedBagTest.java
@@ -46,7 +46,6 @@ public class CollectionSortedBagTest<T> extends AbstractCollectionTest<T> {
         super(CollectionSortedBagTest.class.getSimpleName());
     }
 
-
     /**
      * Overridden because SortedBags don't allow null elements (normally).
      * @return false
@@ -110,7 +109,6 @@ public class CollectionSortedBagTest<T> extends AbstractCollectionTest<T> {
         return (T[]) elements;
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
@@ -123,7 +121,6 @@ public class CollectionSortedBagTest<T> extends AbstractCollectionTest<T> {
 //        writeExternalFormToDisk((java.io.Serializable) getCollection(), "src/test/resources/data/test/CollectionSortedBag.fullCollection.version4.obj");
 //    }
 
-
     /**
      * Compare the current serialized form of the Bag
      * against the canonical version in SCM.
diff --git a/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java b/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java
index 5777ef2ea..e6f5a6079 100644
--- a/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java
+++ b/src/test/java/org/apache/commons/collections4/bag/SynchronizedBagTest.java
@@ -30,7 +30,6 @@ public class SynchronizedBagTest<T> extends AbstractBagTest<T> {
         super(SynchronizedBagTest.class.getSimpleName());
     }
 
-
     @Override
     public Bag<T> makeObject() {
         return SynchronizedBag.synchronizedBag(new HashBag<>());
diff --git a/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java b/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java
index fd7516d20..bfa9805ef 100644
--- a/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java
+++ b/src/test/java/org/apache/commons/collections4/bidimap/DualTreeBidiMap2Test.java
@@ -157,7 +157,6 @@ public class DualTreeBidiMap2Test<K extends Comparable<K>, V extends Comparable<
         return new String[] { recursiveTest };
     }
 
-
 //    public void testCreate() throws Exception {
 //        resetEmpty();
 //        writeExternalFormToDisk((java.io.Serializable) map, "src/test/resources/data/test/DualTreeBidiMap.emptyCollection.version4.Test2.obj");
diff --git a/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java b/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
index 0bd179d00..34cd50d30 100644
--- a/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
+++ b/src/test/java/org/apache/commons/collections4/comparators/AbstractComparatorTest.java
@@ -48,7 +48,6 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
         super(testName);
     }
 
-
     /**
      * Implement this method to return a list of sorted objects.
      *
@@ -204,7 +203,6 @@ public abstract class AbstractComparatorTest<T> extends AbstractObjectTest {
                 }
             }
 
-
             // make sure the canonical form produces the ordering we currently
             // expect
             final List<T> randomList = getComparableObjectsOrdered();
diff --git a/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java
index d9217604c..65a9a5f25 100644
--- a/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/AbstractCompositePredicateTest.java
@@ -124,7 +124,6 @@ public abstract class AbstractCompositePredicateTest<T> extends AbstractMockPred
         assertThrows(NullPointerException.class, () -> getPredicateInstance(new Predicate[] { null, null }));
     }
 
-
     /**
      * Tests {@code getInstance} with a null predicate collection
      */
diff --git a/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
index 77a11bd89..0248403a3 100644
--- a/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/ComparatorPredicateTest.java
@@ -24,7 +24,6 @@ import org.apache.commons.collections4.Predicate;
 import org.apache.commons.collections4.functors.ComparatorPredicate.Criterion;
 import org.junit.jupiter.api.Test;
 
-
 public class ComparatorPredicateTest extends AbstractPredicateTest {
     private static final class TestComparator<T extends Comparable<T>> implements Comparator<T> {
         @Override
diff --git a/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java b/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
index 5243725c1..45d411db3 100644
--- a/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
+++ b/src/test/java/org/apache/commons/collections4/functors/EqualPredicateTest.java
@@ -23,7 +23,6 @@ import static org.junit.jupiter.api.Assertions.assertSame;
 import org.apache.commons.collections4.Predicate;
 import org.junit.jupiter.api.Test;
 
-
 public class EqualPredicateTest extends AbstractPredicateTest {
     private static final EqualsTestObject FALSE_OBJECT = new EqualsTestObject(false);
     private static final EqualsTestObject TRUE_OBJECT = new EqualsTestObject(true);
diff --git a/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java b/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java
index 620ec1e3e..3e9e12fc5 100644
--- a/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java
+++ b/src/test/java/org/apache/commons/collections4/iterators/NodeListIteratorTest.java
@@ -55,7 +55,6 @@ public class NodeListIteratorTest extends AbstractIteratorTest<Node> {
         // Default: use standard constr.
         createIteratorWithStandardConstr = true;
 
-
         // create mocked Node Instances and fill Node[] to be used by test cases
         final Node node1 = createMock(Element.class);
         final Node node2 = createMock(Element.class);
diff --git a/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java b/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java
index ac65d2e51..8d7ac8d19 100644
--- a/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java
+++ b/src/test/java/org/apache/commons/collections4/iterators/PermutationIteratorTest.java
@@ -53,7 +53,6 @@ public class PermutationIteratorTest extends AbstractIteratorTest<List<Character
         testList.addAll(Arrays.asList(testArray));
     }
 
-
     @Override
     public boolean supportsRemove() {
         return false;
diff --git a/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java b/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java
index dfd1aefb4..762865f5e 100644
--- a/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java
+++ b/src/test/java/org/apache/commons/collections4/list/AbstractListTest.java
@@ -829,7 +829,6 @@ public abstract class AbstractListTest<E> extends AbstractCollectionTest<E> {
                 "Exhausted iterator should raise NoSuchElement");
     }
 
-
     /**
      *  Tests the {@link ListIterator#add(Object)} method of the list
      *  iterator.
diff --git a/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java b/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java
index 5d19ce181..5f23d8773 100644
--- a/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/map/AbstractMapTest.java
@@ -681,7 +681,6 @@ public abstract class AbstractMapTest<K, V> extends AbstractObjectTest {
         verify();
     }
 
-
     /**
      * Tests Map.equals(Object)
      */
@@ -1750,7 +1749,6 @@ public abstract class AbstractMapTest<K, V> extends AbstractObjectTest {
         }
     }
 
-
     /**
      * Bulk test {@link Map#keySet()}.  This method runs through all of
      * the tests in {@link AbstractSetTest}.
@@ -1942,7 +1940,6 @@ public abstract class AbstractMapTest<K, V> extends AbstractObjectTest {
         // the value equal to the value returned from the values iterator.
     }
 
-
     /**
      * Resets the {@link #map}, {@link #entrySet}, {@link #keySet},
      * {@link #values} and {@link #confirmed} fields to empty.
diff --git a/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java b/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java
index 2f74d2652..f7da0a7df 100644
--- a/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/map/LazyMapTest.java
@@ -83,7 +83,6 @@ public class LazyMapTest<K, V> extends AbstractIterableMapTest<K, V> {
         assertEquals(1, map.size());
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
diff --git a/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java b/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
index 02f8ecd49..d3b1292b4 100644
--- a/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
+++ b/src/test/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMapTest.java
@@ -65,7 +65,6 @@ public abstract class AbstractMultiValuedMapTest<K, V> extends AbstractObjectTes
     /** MultiValuedHashMap created by reset(). */
     protected MultiValuedMap<K, V> confirmed;
 
-
     public AbstractMultiValuedMapTest(final String testName) {
         super(testName);
     }
diff --git a/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java b/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java
index 331b11e47..a72652bf7 100644
--- a/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/multiset/AbstractMultiSetTest.java
@@ -110,7 +110,6 @@ public abstract class AbstractMultiSetTest<T> extends AbstractCollectionTest<T>
         return multiset;
     }
 
-
     @Override
     public void resetEmpty() {
         this.setCollection(makeObject());
@@ -615,7 +614,6 @@ public abstract class AbstractMultiSetTest<T> extends AbstractCollectionTest<T>
         assertEquals(total, multiset2.hashCode());
     }
 
-
     /**
      * Bulk test {@link MultiSet#uniqueSet()}.  This method runs through all of
      * the tests in {@link AbstractSetTest}.
@@ -698,7 +696,6 @@ public abstract class AbstractMultiSetTest<T> extends AbstractCollectionTest<T>
         }
     }
 
-
     /**
      * Compare the current serialized form of the MultiSet
      * against the canonical version in SCM.
diff --git a/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java b/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java
index 8b213ed43..160e739eb 100644
--- a/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java
+++ b/src/test/java/org/apache/commons/collections4/queue/UnmodifiableQueueTest.java
@@ -116,7 +116,6 @@ public class UnmodifiableQueueTest<E> extends AbstractQueueTest<E> {
         assertThrows(UnsupportedOperationException.class, () -> queue.poll());
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
diff --git a/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java b/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java
index 02352be32..4efb28e00 100644
--- a/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/set/AbstractNavigableSetTest.java
@@ -69,7 +69,6 @@ public abstract class AbstractNavigableSetTest<E> extends AbstractSortedSetTest<
         return new TreeSet<>();
     }
 
-
     /**
      * Verification extension, will check the order of elements,
      * the sets should already be verified equal.
diff --git a/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java b/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java
index c62802592..cf090a713 100644
--- a/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/set/UnmodifiableNavigableSetTest.java
@@ -124,7 +124,6 @@ public class UnmodifiableNavigableSetTest<E> extends AbstractNavigableSetTest<E>
         assertNull(c, "natural order, so comparator should be null");
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4.1";
diff --git a/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java b/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java
index 574cb4292..b91fcf7cf 100644
--- a/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java
+++ b/src/test/java/org/apache/commons/collections4/set/UnmodifiableSortedSetTest.java
@@ -121,7 +121,6 @@ public class UnmodifiableSortedSetTest<E> extends AbstractSortedSetTest<E> {
         assertNull(c, "natural order, so comparator should be null");
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";
diff --git a/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java b/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java
index f4802c5bd..326565df6 100644
--- a/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java
+++ b/src/test/java/org/apache/commons/collections4/trie/PatriciaTrie2Test.java
@@ -40,7 +40,6 @@ public class PatriciaTrie2Test<V> extends AbstractOrderedMapTest<String, V> {
         return false;
     }
 
-
     @Override
     public String getCompatibilityVersion() {
         return "4";