cleaned up

src/main/java/difflib/DiffRow.java

@@ -125,6 +125,7 @@ public class DiffRow {
         return true;
     }
     
+    @Override
     public String toString() {
         return "[" + this.tag + "," + this.oldLine + "," + this.newLine + "]";
     }

src/main/java/difflib/DiffRowGenerator.java

@@ -17,7 +17,6 @@ package difflib;
 
 import difflib.DiffRow.Tag;
 import difflib.myers.Equalizer;
-
 import java.util.*;
 
 /**

src/main/java/difflib/DiffUtils.java

@@ -17,7 +17,6 @@ package difflib;
 
 import difflib.myers.Equalizer;
 import difflib.myers.MyersDiff;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
@@ -159,7 +158,7 @@ public class DiffUtils {
 			Matcher m = unifiedDiffChunkRe.matcher(line);
 			if (m.find()) {
 				// Process the lines in the previous chunk
-				if (rawChunk.size() != 0) {
+				if (!rawChunk.isEmpty()) {
 					List<String> oldChunkLines = new ArrayList<String>();
 					List<String> newChunkLines = new ArrayList<String>();
 
@@ -202,7 +201,7 @@ public class DiffUtils {
 		}
 
 		// Process the lines in the last chunk
-		if (rawChunk.size() != 0) {
+		if (!rawChunk.isEmpty()) {
 			List<String> oldChunkLines = new ArrayList<String>();
 			List<String> newChunkLines = new ArrayList<String>();
 

src/main/java/difflib/myers/MyersDiff.java

@@ -58,7 +58,6 @@
 package difflib.myers;
 
 import difflib.*;
-
 import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Arrays;

src/main/java/difflib/myers/PathNode.java

@@ -123,6 +123,7 @@ public abstract class PathNode {
     /**
      * {@inheritDoc}
      */
+    @Override
     public String toString() {
         StringBuffer buf = new StringBuffer("[");
         PathNode node = this;

src/test/java/diffutils/DiffRowGeneratorTest.java

@@ -1,11 +1,9 @@
 package diffutils;
 
-import java.util.Arrays;
-import java.util.List;
-
 import difflib.DiffRow;
 import difflib.DiffRowGenerator;
-
+import java.util.Arrays;
+import java.util.List;
 import junit.framework.TestCase;
 
 public class DiffRowGeneratorTest  extends TestCase {

src/test/java/diffutils/DiffTest.java

@@ -1,12 +1,11 @@
 package diffutils;
 
 import difflib.*;
-import junit.framework.TestCase;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import junit.framework.TestCase;
 
 public class DiffTest extends TestCase {
 

src/test/java/diffutils/GenerateUnifiedDiffTest.java

@@ -1,5 +1,8 @@
 package diffutils;
 
+import difflib.DiffUtils;
+import difflib.Patch;
+import difflib.PatchFailedException;
 import java.io.BufferedReader;
 import java.io.FileReader;
 import java.io.IOException;
@@ -7,11 +10,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
-
 import junit.framework.TestCase;
-import difflib.DiffUtils;
-import difflib.Patch;
-import difflib.PatchFailedException;
 
 public class GenerateUnifiedDiffTest extends TestCase {
 

src/test/java/diffutils/PatchTest.java

@@ -3,10 +3,9 @@ package diffutils;
 import difflib.DiffUtils;
 import difflib.Patch;
 import difflib.PatchFailedException;
-import junit.framework.TestCase;
-
 import java.util.Arrays;
 import java.util.List;
+import junit.framework.TestCase;
 
 public class PatchTest extends TestCase {
 

src/test/java/diffutils/examples/ApplyPatch.java

@@ -1,11 +1,10 @@
 package diffutils.examples;
 
-import java.util.List;
-
 import difflib.DiffUtils;
 import difflib.Patch;
 import difflib.PatchFailedException;
 import diffutils.TestConstants;
+import java.util.List;
 
 public class ApplyPatch extends Example {
 

src/test/java/diffutils/examples/ComputeDifference.java

@@ -1,11 +1,10 @@
 package diffutils.examples;
 
-import java.util.List;
-
 import difflib.Delta;
 import difflib.DiffUtils;
 import difflib.Patch;
 import diffutils.TestConstants;
+import java.util.List;
 
 public class ComputeDifference extends Example {