Fixed a typo

Author: mitsuhiko

flask/ctx.py

@@ -62,7 +62,7 @@ def __init__(self, username, remote_addr=None):
 
 
 def has_app_context():
-    """Worksl ike :func:`has_request_context` but for the application
+    """Works like :func:`has_request_context` but for the application
     context.  You can also just do a boolean check on the
     :data:`current_app` object instead.