code: public List<String> getUnifiedDiffStrings(int contextSize) {
  		return DiffUtils.generateUnifiedDiff("Before", "After", sentenceSplit(beforeText), getPatch(), contextSize);
  	}
docs: Returns the unified diff between "Before" and "After"
  containing one sentence per String.
  <code>contextSize</code> defines a window of lines/sentences around each change
  to display
  
  @param contextSize numer of lines/sentences around a change to display
  @return diffs as line-separated String