Removing whitespace

Have you tried playing around with the HTMLWriter? There's various ways this can be done. I've seen some use this code to remove extra tags:

CKEDITOR.on('instanceReady', function( ev ) {
  var blockTags = ['div','h1','h2','h3','h4','h5','h6','p','pre','li','blockquote','ul','ol',
  'table','thead','tbody','tfoot','td','th',];

  for (var i = 0; i < blockTags.length; i++)
  {
     ev.editor.dataProcessor.writer.setRules( blockTags[i], {
        indent : false,
        breakBeforeOpen : true,
        breakAfterOpen : false,
        breakBeforeClose : false,
        breakAfterClose : true
     });
  }
});