Fix broken javadoc. (#938)

src/main/java/org/apache/commons/lang3/ObjectUtils.java

@@ -82,7 +82,7 @@ public class ObjectUtils {
         }
 
         /**
-         * <p>Ensure singleton.</p>
+         * <p>Ensure Singleton after serialization.</p>
          *
          * @return the singleton value
          */

src/main/java/org/apache/commons/lang3/builder/ToStringStyle.java

@@ -2064,7 +2064,7 @@ public abstract class ToStringStyle implements Serializable {
         }
 
         /**
-         * <p>Ensure {@link Singleton} after serialization.</p>
+         * <p>Ensure Singleton after serialization.</p>
          *
          * @return the singleton
          */
@@ -2095,7 +2095,7 @@ public abstract class ToStringStyle implements Serializable {
         }
 
         /**
-         * <p>Ensure {@link Singleton} after serialization.</p>
+         * <p>Ensure Singleton after serialization.</p>
          *
          * @return the singleton
          */
@@ -2193,7 +2193,7 @@ public abstract class ToStringStyle implements Serializable {
         }
 
         /**
-         * <p>Ensure {@link Singleton} after serialization.</p>
+         * <p>Ensure Singleton after serialization.</p>
          *
          * @return the singleton
          */
@@ -2225,7 +2225,7 @@ public abstract class ToStringStyle implements Serializable {
         }
 
         /**
-         * <p>Ensure {@link Singleton} after serialization.</p>
+         * <p>Ensure Singleton after serialization.</p>
          *
          * @return the singleton
          */
@@ -2557,7 +2557,7 @@ public abstract class ToStringStyle implements Serializable {
 
         /**
          * <p>
-         * Ensure {@link Singleton} after serialization.
+         * Ensure Singleton after serialization.
          * </p>
          *
          * @return the singleton

src/main/java/org/apache/commons/lang3/concurrent/BasicThreadFactory.java

@@ -110,7 +110,7 @@ public class BasicThreadFactory implements ThreadFactory {
     private final Boolean daemon;
 
     /**
-     * Creates a new instance of {@link ThreadFactoryImpl} and configures it
+     * Creates a new instance of {@link ThreadFactory} and configures it
      * from the specified {@link Builder} object.
      *
      * @param builder the {@link Builder} object

src/main/java/org/apache/commons/lang3/math/Fraction.java

@@ -517,7 +517,7 @@ public final class Fraction extends Number implements Comparable<Fraction> {
      * <p>The returned fraction is in reduced form.</p>
      *
      * @param power  the power to raise the fraction to
-     * @return {@code this} if the power is one, {@link ONE} if the power
+     * @return {@code this} if the power is one, {@link #ONE} if the power
      * is zero (even if the fraction equals ZERO) or a new fraction instance
      * raised to the appropriate power
      * @throws ArithmeticException if the resulting numerator or denominator exceeds

src/main/java/org/apache/commons/lang3/time/FastDatePrinter.java

@@ -921,7 +921,7 @@ public class FastDatePrinter implements DatePrinter, Serializable {
         private final int mField;
 
         /**
-         * Constructs an instance of {@link UnpadedNumberField} with the specified field.
+         * Constructs an instance of {@link UnpaddedNumberField} with the specified field.
          *
          * @param field the field
          */