[gnome-shell] overviewControls: Fix typos in comment

[Florian Müllner <fmuellner src gnome org>]

commit a00762ddd94d021994599e6441c3982eccfed2af
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun Aug 31 03:30:48 2014 +0200

    overviewControls: Fix typos in comment

 js/ui/overviewControls.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 261c103..e37ee70 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -177,8 +177,8 @@ const SlidingControl = new Lang.Class({
     },
 
     _onOverviewHiding: function() {
-        // We need to explicitily slideOut since showing pages
-        // doesn't implies to slide out, instead, hiding the overview does.
+        // We need to explicitly slideOut since showing pages
+        // doesn't imply sliding out, instead, hiding the overview does.
         this.slideOut();
     },