diff --git a/src/main/java/org/apache/commons/lang3/StringUtils.java b/src/main/java/org/apache/commons/lang3/StringUtils.java
index 16d57b98f..82016aa23 100644
--- a/src/main/java/org/apache/commons/lang3/StringUtils.java
+++ b/src/main/java/org/apache/commons/lang3/StringUtils.java
@@ -6091,14 +6091,14 @@ public class StringUtils {
         }
 
         int targetSting = length-middle.length();
-	 int startOffset = targetSting/2+targetSting%2;
+        int startOffset = targetSting/2+targetSting%2;
         int endOffset = str.length()-targetSting/2;
-	    
-	 StringBuilder builder = new StringBuilder(length);
-	 builder.append(str.substring(0,startOffset));
-	 builder.append(middle);
-	 builder.append(str.substring(endOffset));
-	    
+        
+        StringBuilder builder = new StringBuilder(length);
+        builder.append(str.substring(0,startOffset));
+        builder.append(middle);
+        builder.append(str.substring(endOffset));
+        
         return builder.toString();
     }
 }
diff --git a/src/main/java/org/apache/commons/lang3/Validate.java b/src/main/java/org/apache/commons/lang3/Validate.java
index 5e83b7075..4c867a5fc 100644
--- a/src/main/java/org/apache/commons/lang3/Validate.java
+++ b/src/main/java/org/apache/commons/lang3/Validate.java
@@ -60,7 +60,7 @@ public class Validate {
     private static final String DEFAULT_VALID_INDEX_ARRAY_EX_MESSAGE = "The validated array index is invalid: %d";
     private static final String DEFAULT_VALID_INDEX_CHAR_SEQUENCE_EX_MESSAGE = "The validated character sequence index is invalid: %d";
     private static final String DEFAULT_VALID_INDEX_COLLECTION_EX_MESSAGE = "The validated collection index is invalid: %d";
-	private static final String DEFAULT_VALID_STATE_EX_MESSAGE = "The validated state is false";
+    private static final String DEFAULT_VALID_STATE_EX_MESSAGE = "The validated state is false";
 
     /**
      * Constructor. This class should not normally be instantiated.
diff --git a/src/main/java/org/apache/commons/lang3/time/DateUtils.java b/src/main/java/org/apache/commons/lang3/time/DateUtils.java
index 0f4e2a4f4..e39975163 100644
--- a/src/main/java/org/apache/commons/lang3/time/DateUtils.java
+++ b/src/main/java/org/apache/commons/lang3/time/DateUtils.java
@@ -308,7 +308,7 @@ public class DateUtils {
         return parseDateWithLeniency(str, parsePatterns, false);
     }
     private static Date parseDateWithLeniency(String str, String[] parsePatterns,
-			boolean lenient) throws ParseException {
+            boolean lenient) throws ParseException {
         if (str == null || parsePatterns == null) {
             throw new IllegalArgumentException("Date and Patterns must not be null");
         }