docs(toh-pt5): fix typo (angular#2836)

Author: chrisjsherm

public/docs/ts/latest/tutorial/toh-pt5.jade

@@ -692,7 +692,7 @@ block extract-id
      null,
     `app/app.module.ts (after), app/app.module.ts (before)`)
   :marked
-    It's simpler and focused on indentifying the key pieces of the application.
+    It's simpler and focused on identifying the key pieces of the application.
 
 .l-main-section
 :marked