Make it more clear mount documentation or resolve little issue about mount

Be careful there is sensible case : 

salt 'target' state.single mount.unmounted name="/var/www/owncloud/data/"

wil says : already unmounted... but in reality is not ! 

And the correcty name is the following (without '/'): 

salt 'target' state.single mount.unmounted name="/var/www/owncloud/data"

It would be usefull to resolve this on python script, or make it more clear the documentation.

Laurent.