Fix help output for enter command

README.md

@@ -21,7 +21,7 @@ postgres:clone <name> <new-name>  Create container <new-name> then copy data fro
 postgres:connect <name>           Connect via psql to a postgres service
 postgres:create <name>            Create a postgres service with environment variables
 postgres:destroy <name>           Delete the service and stop its container if there are no links left
-postgres:enter <name> [command]   Enter a running couchdb service or run a command
+postgres:enter <name> [command]   Enter or run a command in a running postgres service container
 postgres:export <name> > <file>   Export a dump of the postgres service database
 postgres:expose <name> [port]     Expose a postgres service on custom port if provided (random port otherwise)
 postgres:import <name> < <file>   Import a dump into the postgres service database