diff --git a/www/js/app.js b/www/js/app.js
index b0421387..30ec53b2 100755
--- a/www/js/app.js
+++ b/www/js/app.js
@@ -1031,7 +1031,7 @@ define(['jquery', 'zimArchiveLoader', 'util', 'uiUtil', 'cookies','abstractFiles
      * @param {DirEntry} dirEntry The directory entry of the article to read
      */
     function readArticle(dirEntry) {
-		// Only update for expectedArticleURLToBeDisplayed.
+	    // Only update for expectedArticleURLToBeDisplayed.
         expectedArticleURLToBeDisplayed = dirEntry.namespace + "/" + dirEntry.url;
         // We must remove focus from UI elements in order to deselect whichever one was clicked (in both jQuery and SW modes),
         // but we should not do this when opening the landing page (or else one of the Unit Tests fails, at least on Chrome 58)