anchor.diff:              buttons.redo.execute = function (manager) { if (manager) manager.redo(); };
   
               if (helpOptions) {
  -                group5 = makeGroup(5);
  +                var group5 = makeGroup(5);
                   group5.className = group5.className + " pull-right";
                   var helpButton = document.createElement("button");
                   var helpButtonImage = document.createElement("i");
  
positive.code:             buttons.quote = makeButton("wmd-quote-button", "<%= I18n.t('components.markdown_editor.blockquoute.button_title', default: 'Blockquote (Ctrl+Q)') %>", "fa fa-quote-left", bindCommand("doBlockquote"), group2);
              buttons.code = makeButton("wmd-code-button", "<%= I18n.t('components.markdown_editor.code_sample.button_title', default: 'Code Sample (Ctrl+K)') %>", "fa fa-code", bindCommand("doCode"), group2);
  
              group3 = makeGroup(3);
              buttons.ulist = makeButton("wmd-ulist-button", "<%= I18n.t('components.markdown_editor.bulleted_list.button_title', default: 'Bulleted List (Ctrl+U)') %>", "fa fa-list-ul", bindCommand(function (chunk, postProcessing) {
                  this.doList(chunk, postProcessing, false);
              }), group3);
  
negative.code:             }), group3);
              buttons.heading = makeButton("wmd-heading-button", "<%= I18n.t('components.markdown_editor.heading.button_title', default: 'Heading (Ctrl+H)') %>", "fa fa-font", bindCommand("doHeading"), group3);
  
              var group4 = makeGroup(4);
              buttons.undo = makeButton("wmd-undo-button", "<%= I18n.t('components.markdown_editor.undo.button_title', default: 'Undo (Ctrl+Z)') %>", "fa fa-undo", null, group4);
              buttons.undo.execute = function (manager) { if (manager) manager.undo(); };
  
  