diff --git a/.jshintignore b/.jshintignore
index 338716108..d243f9260 100644
--- a/.jshintignore
+++ b/.jshintignore
@@ -30,3 +30,4 @@ customize/
 www/debug/chainpad.dist.js
 
 www/pad/mathjax/
+www/code/mermaid.js
diff --git a/www/common/diffMarked.js b/www/common/diffMarked.js
index 1e5db4188..bac8efda2 100644
--- a/www/common/diffMarked.js
+++ b/www/common/diffMarked.js
@@ -70,7 +70,7 @@ define([
     var mediaMap = {};
 
     renderer.code = function (code, language) {
-        if(language == 'mermaid' && (code.match(/^sequenceDiagram/) || code.match(/^graph/))) {
+        if (language === 'mermaid' && (code.match(/^sequenceDiagram/) || code.match(/^graph/))) {
             return '<pre class="mermaid">'+code+'</pre>';
         } else {
             return '<pre><code>'+code+'</code></pre>';