Merge pull request #1 from colinodell/patch-2

Fix small typo

Author: bretterer

proposed/event-manager.md

@@ -48,7 +48,7 @@ MUST contain a event name in order trigger the listeners. Each event MAY have a
 target which is an object that is the context the event is being triggered for.
 OPTIONALLY the event can have additional parameters for use within the event.
 
-The event MUST contain a propegation flag that singles the EventManager to stop
+The event MUST contain a propegation flag that signals the EventManager to stop
 passing along the event to other listeners.
 
 ```php
@@ -183,4 +183,4 @@ interface EventManagerInterface
      */
     public function trigger($event, $target = null, $argv = array());
 }
-```
+```