Add example confirming Pathnames can be used as param values.

[jrafanie]

Fixed by 6a75513
Fixes #22

[coveralls]

Coverage remained the same when pulling 9af2145 on jrafanie:verify_pathname_in_option_values into 8dbd565 on ManageIQ:master.

[Fryguy]

Should we also handle pathname objects in the cmd variable to run?

[jrafanie]

@Fryguy It should work. The cmd is interpolated here (https://github.com/ManageIQ/linux_admin/blob/master/lib/linux_admin/common.rb#L66) so it should just work if it's a Pathname. The issue this spec confirms is fixed is that we called shellescape on the Pathname object here previously: 6a75513#L0L49

I can add another example with a cmd variable for further confirmation but I think we're all good.

[Fryguy]

Yeah, maybe we should add another spec to show that we support it, especially if a refactoirng comes in the future.

[jrafanie]

@Fryguy Closing this pull request as your comment about Pathname support for commands reveals a bug I'll fix separately.