Correct Javadoc of DiffFormatter class

This class does a lot more than just reflow a patch script, it now is
the primary means of creating a diff output.

Change-Id: I74467c9a53dc270ef8c84e7c75f388414ec8ba8f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit/src/org/eclipse/jgit/diff/DiffFormatter.java

@@ -73,7 +73,7 @@ import org.eclipse.jgit.util.QuotedString;
 import org.eclipse.jgit.util.io.DisabledOutputStream;
 
 /**
- * Format an {@link EditList} as a Git style unified patch script.
+ * Format a Git style patch script.
  */
 public class DiffFormatter {
 	private static final byte[] noNewLine = encodeASCII("\\ No newline at end of file\n");