Merge pull request #1441 from deis/1440-fix-cli-default-cluster

fix(client): restore `--cluster=dev` as apps:create default

Author: mboersma

client/deis.py

@@ -415,7 +415,7 @@ def apps_create(self, args):
 
         Options:
           --cluster=<cluster>
-            target cluster to host application (default: dev).
+            target cluster to host application [default: dev].
           --no-remote
             do not create a `deis` git remote.
         """