Update internals.rst

The proper idiom is "behind the scenes". I also fixed the sentence structure.
symfony · Jul 18, 2014 · 9966b90 · 9966b90
1 parent 74c2e94
commit 9966b90
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/book/internals.rst b/book/internals.rst
@@ -10,8 +10,8 @@ Symfony2 internals.
 
 .. note::
 
-    You need to read this section only if you want to understand how Symfony2
-    works behind the scene, or if you want to extend Symfony2.
+    You only need to read this section if you want to understand how Symfony2
+    works behind the scenes, or if you want to extend Symfony2.
 
 Overview
 --------