Merge pull request googleapis#2604 from mlissner/patch-1

Fixes typo

Author: dhermes

core/google/cloud/client.py

@@ -155,7 +155,7 @@ def _determine_default(project):
 
 
 class JSONClient(Client, _ClientProjectMixin):
-    """Client to for Google JSON-based API.
+    """Client for Google JSON-based API.
 
     Assumes such APIs use the ``project`` and the client needs to store this
     value.