fixing python3 bug and weird highlighting bug

profile/ipython_config.py

@@ -2,8 +2,8 @@
 # exe:    Path to IHaskell kernel.
 c = get_config()
 c.KernelManager.kernel_cmd = [exe, 'kernel', '{connection_file}']
-c.Session.key = ''
-c.Session.keyfile = ''
+c.Session.key = b''
+c.Session.keyfile = b''
 
 # Syntax highlight properly in Haskell notebooks. 
 c.NbConvertBase.default_language = "haskell"

profile/static/custom/custom.js

@@ -53,7 +53,7 @@ $([IPython.events]).on('notebook_loaded.Notebook', function(){
     // add here logic that should be run once per **notebook load**
     // (!= page load), like restarting a checkpoint
 
-    var md = IPython.notebook.metadata 
+    var md = IPython.notebook.metadata;
     if(md.language){
         console.log('language already defined and is :', md.language);
     } else {
@@ -71,14 +71,21 @@ $([IPython.events]).on('app_initialized.NotebookApp', function(){
         cells = IPython.notebook.get_cells();
         for(var i in cells){
             c = cells[i];
-            if (c.cell_type === 'code'){
+            if (c.cell_type === 'code') {
+                // Force the mode to be Haskell
+                // This is necessary, otherwise sometimes highlighting just doesn't happen.
+                // This may be an IPython bug.
+                c.code_mirror.setOption('mode', 'haskell');
+
                 c.auto_highlight()
             }
         }
-    })
+
+        // We can only load the conceal scripts once all cells have mode 'haskell'
+        require(['/static/custom/conceal/conceal.js']);
+    });
 
     IPython.CodeCell.options_default['cm_config']['mode'] = 'haskell';
-    require(['/static/custom/conceal/conceal.js']);
 });
 
 var highlightCodes = function() {