fix a typo (--create -> create)

znz · znz · commit c146111edede · 2016-03-18T00:27:16.000+09:00
Signed-off-by: Kazuhiro NISHIYAMA &lt;zn@mbf.nifty.com&gt;
diff --git a/docs/examples/ocean.md b/docs/examples/ocean.md
@@ -133,7 +133,7 @@ To remove a host and all of its containers and images, first stop the machine, t
 
 If you monitor the Digital Ocean console while you run these commands, you will see it update first to reflect that the Droplet was stopped, and then removed.
 
-If you create a host with Docker Machine, but remove it through the cloud provider console, Machine will lose track of the server status. So please use the `docker-machine rm` command for hosts you create with `docker-machine --create`.
+If you create a host with Docker Machine, but remove it through the cloud provider console, Machine will lose track of the server status. So please use the `docker-machine rm` command for hosts you create with `docker-machine create`.
 
 ## Where to go next
 
