DevTools: [CodeMirror] roll CodeMirror to version @e20d175

LayoutTests/inspector/syntax-highlight.js

 var initialize_SyntaxHighlight = function() {
 
 InspectorTest.dumpSyntaxHighlight = function(str, mimeType)
 {
     var node = document.createElement("span");
     node.textContent = str;
     var javascriptSyntaxHighlighter = new WebInspector.DOMSyntaxHighlighter(mimeType);
     javascriptSyntaxHighlighter.syntaxHighlightNode(node);
     var node_parts = [];
     for (var i = 0; i < node.childNodes.length; i++) {
         if (node.childNodes[i].getAttribute) {
             node_parts.push(node.childNodes[i].getAttribute("class"));
         } else {
             node_parts.push("*");
         }
     }
-    InspectorTest.addResult(str + ": " + node_parts.join(","));
+    InspectorTest.addResult(str + ": " + node_parts.join(", "));
 };
 
 };