Fixed code mirror bug for markdown cells

IPython/html/static/notebook/js/codecell.js

@@ -227,9 +227,6 b' define(['
      *  @method handle_codemirror_keyevent
      */
 
-     /* Correction here */
-
-
     CodeCell.prototype.handle_codemirror_keyevent = function (editor, event) {
 
         var that = this;