From a67c7e83a6c0081924dbdd61beb1cc620ef1a8ed Mon Sep 17 00:00:00 2001
From: "Brian E. Granger" <ellisonbg@gmail.com>
Date: Fri, 29 Aug 2014 09:55:40 -0400
Subject: [PATCH] Adding tests and limiting CM mode to python 3.

---
 IPython/html/static/notebook/js/codemirror-ipython.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/IPython/html/static/notebook/js/codemirror-ipython.js b/IPython/html/static/notebook/js/codemirror-ipython.js
index 575abad29..351c98f4e 100644
--- a/IPython/html/static/notebook/js/codemirror-ipython.js
+++ b/IPython/html/static/notebook/js/codemirror-ipython.js
@@ -15,7 +15,12 @@ CodeMirror.requireMode('python',function(){
         }
         pythonConf.name = 'python';
         pythonConf.singleOperators = new RegExp("^[\\+\\-\\*/%&|\\^~<>!\\?]");
-        pythonConf.identifiers = new RegExp("^[_A-Za-z\u00A1-\uFFFF][_A-Za-z0-9\u00A1-\uFFFF]*");
+        if (pythonConf.version === 3) {
+            console.log('setting up for python 3');
+            pythonConf.identifiers = new RegExp("^[_A-Za-z\u00A1-\uFFFF][_A-Za-z0-9\u00A1-\uFFFF]*");
+        } else if (pythonConf.version === 2) {
+            pythonConf.identifiers = new RegExp("^[_A-Za-z][_A-Za-z0-9]*");
+        }
         return CodeMirror.getMode(conf, pythonConf);
     }, 'python');