125     function diff($from_lines, $to_lines) {  function in _DiffEngine
533         $this->edits = $eng->diff($from_lines, $to_lines);
733      * @param Diff $diff A Diff object.
736     function format($diff) {  argument
748         foreach ($diff->edits as $edit) {
1129      * @param Diff $diff
1132     function format($diff) {  argument
1135         $val = parent::format($diff);
1214         $diff = new WordLevelDiff($orig, $closing);  // this escapes the diff data
1215         $del = $diff->orig();
1216         $add = $diff->closing();
1243      * @param Diff $diff
1246     function format($diff) {  argument
1249         $val = parent::format($diff);
1302         $diff = new InlineWordLevelDiff($orig, $closing);  // this escapes the diff data
1303         $add = $diff->inline();
1338         $this->_edits = $this->_diff3($engine->diff($orig, $final1),
1339                                       $engine->diff($orig, $final2));