Merge pull request #2152 from kate-kate/patch-1

Doc typo

docs/guide/behaviors.md

@@ -3,7 +3,7 @@ Behaviors
 
 A behavior (also knows as *mixin*) can be used to enhance the functionality of an existing component without modifying the component's
 code. In particular, a behavior can "inject" its own methods and properties into the component, making them directly accessible
-via the component itslef. A behavior can also respond to  events triggered in the component, thus intercepting the normal
+via the component itself. A behavior can also respond to  events triggered in the component, thus intercepting the normal
 code execution. Unlike [PHP's traits](http://www.php.net/traits), behaviors can be attached to classes at runtime.
 
 Using behaviors