code: public String differenceBetweenIgnoreWhitespaceAnd(String first, String second) {
          String cleanFirst = allWhitespaceToSingleSpace(first);
          String cleanSecond = allWhitespaceToSingleSpace(second);
          String cleanDiff = differenceBetweenAnd(cleanFirst, cleanSecond);
          if (cleanDiff != null) {
              if (("<div>"+ cleanFirst + "</div>").equals(cleanDiff)) {
                  cleanDiff = "<div>" + first + "</div>";
              } else if (cleanFirst != null && cleanFirst.equals(cleanDiff)) {
                  cleanDiff = first;
              }
          }
          return cleanDiff;
      }
docs: Determines difference between two strings, ignoring whitespace changes.
  @param first first string to compare.
  @param second second string to compare.
  @return HTML of difference between the two.