a few todo

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

@@ -6,6 +6,7 b' define(['
     'jquery',
     'base/js/utils',
 ], function(IPython, $, utils) {
+    // TODO: remove IPython dependency here 
     "use strict";
 
     // monkey patch CM to be able to syntax highlight cell magics
@@ -556,7 +557,7 b' define(['
         this.code_mirror.setOption('mode', default_mode);
     };
 
-    // Backwards compatability.
+    // Backwards compatibility.
     IPython.Cell = Cell;
 
     return {'Cell': Cell};

IPython/html/static/notebook/js/celltoolbar.js

@@ -16,6 +16,9 b' define(['
         //          events: $(Events) instance 
         //          cell: Cell instance
         //          notebook: Notebook instance 
+        //
+        //  TODO: This leaks, when cell are deleted
+        //  There is still a reference to each celltoolbars. 
         CellToolbar._instances.push(this);
         this.notebook = options.notebook;
         this.events = options.events;