Update CodeMirror code to v2.15

IPython/frontend/html/notebook/static/codemirror-2.12/mode/python/python.js

@@ -1,11 +1,11 @@
-CodeMirror.defineMode("python", function(conf) {
+CodeMirror.defineMode("python", function(conf, parserConf) {
     var ERRORCLASS = 'error';
     
     function wordRegexp(words) {
         return new RegExp("^((" + words.join(")|(") + "))\\b");
     }
     
-    var singleOperators = new RegExp("^[\\+\\-\\*/%&|\\^~<>!\\?]");
+    var singleOperators = new RegExp("^[\\+\\-\\*/%&|\\^~<>!]");
     var singleDelimiters = new RegExp('^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]');
     var doubleOperators = new RegExp("^((==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//)|(\\*\\*))");
     var doubleDelimiters = new RegExp("^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))");
@@ -29,7 +29,7 @@ CodeMirror.defineMode("python", function(conf) {
                          'open', 'range', 'zip'],
                'keywords': ['nonlocal']};
 
-    if (!!conf.mode.version && parseInt(conf.mode.version, 10) === 3) {
+    if (!!parserConf.version && parseInt(parserConf.version, 10) === 3) {
         commonkeywords = commonkeywords.concat(py3.keywords);
         commontypes = commontypes.concat(py3.types);
         var stringPrefixes = new RegExp("^(([rb]|(br))?('{3}|\"{3}|['\"]))", "i");
@@ -147,10 +147,9 @@ CodeMirror.defineMode("python", function(conf) {
     }
     
     function tokenStringFactory(delimiter) {
-        while ('rub'.indexOf(delimiter[0].toLowerCase()) >= 0) {
+        while ('rub'.indexOf(delimiter.charAt(0).toLowerCase()) >= 0) {
             delimiter = delimiter.substr(1);
         }
-        var delim_re = new RegExp(delimiter);
         var singleline = delimiter.length == 1;
         var OUTCLASS = 'string';
         
@@ -162,7 +161,7 @@ CodeMirror.defineMode("python", function(conf) {
                     if (singleline && stream.eol()) {
                         return OUTCLASS;
                     }
-                } else if (stream.match(delim_re)) {
+                } else if (stream.match(delimiter)) {
                     state.tokenize = tokenBase;
                     return OUTCLASS;
                 } else {
@@ -170,8 +169,8 @@ CodeMirror.defineMode("python", function(conf) {
                 }
             }
             if (singleline) {
-                if (conf.mode.singleLineStringErrors) {
-                    OUTCLASS = ERRORCLASS
+                if (parserConf.singleLineStringErrors) {
+                    return ERRORCLASS;
                 } else {
                     state.tokenize = tokenBase;
                 }