Test length of comps when listing mounts
Test length of comps when listing mounts

If the stdout returned from the mount command ends with a newline char,
this produces an empty string during splitting.  This empty string is
attempted to be ``split()`` on whitespace, and thus produces an
empty-length list, which errors on the following line because no
elements are present.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt