minor fixes to docs to address PR feedback

IPython/html/static/notebook/js/cell.js

@@ -164,7 +164,7 b' var IPython = (function (IPython) {'
      *
      * @method handle_codemirror_keyevent
      * @param {CodeMirror} editor - The codemirror instance bound to the cell
-     * @param {event} event -
+     * @param {event} event - key press event which either should or should not be handled by CodeMirror
      * @return {Boolean} `true` if CodeMirror should ignore the event, `false` Otherwise
      */
     Cell.prototype.handle_codemirror_keyevent = function (editor, event) {

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

@@ -202,9 +202,9 b' var IPython = (function (IPython) {'
             // is actually empty
             IPython.tooltip.pending(that, true);
         } else if ( tooltip_closed && event.which === keycodes.esc && event.type === 'keydown') {
-            // If tooltip is active, cancel it.
-            // The call to remove_and_cancel_tooltip above in L177 doesn't pass
-            // force=true. Because of this it won't actually close the tooltip
+            // If tooltip is active, cancel it.  The call to
+            // remove_and_cancel_tooltip above doesn't pass, force=true.
+            // Because of this it won't actually close the tooltip
             // if it is in sticky mode. Thus, we have to check again if it is open
             // and close it with force=true.
             if (!IPython.tooltip._hidden) {
@@ -410,7 +410,7 b' var IPython = (function (IPython) {'
 
     CodeCell.input_prompt_classical = function (prompt_value, lines_number) {
         var ns;
-        if (prompt_value == undefined) {
+        if (prompt_value === undefined) {
             ns = " ";
         } else {
             ns = encodeURIComponent(prompt_value);