diff --git a/static/js/Editor.js b/static/js/Editor.js
index 28ec366..732da09 100644
--- a/static/js/Editor.js
+++ b/static/js/Editor.js
@@ -221,7 +221,7 @@ Editor.prototype.set_iframe_contents = function ( contents_text ) {
}
this.document.write(
- '' +
+ '' +
'' + contents_text + ''
);
this.document.close();