Support for multiple arguments to rm & dev questions

[Oliver Albertini]

> 1. You get the directory of the file via "${passfile%/*}" - isn't "dirname" the appropriate solution?
> 2. Why do you use double brackets where single brackets i.e. the test command would suffice?

It's preferable to use internal bash features instead of relying on external commands, when possible. This makes the code more portable and reduces the number of processes that run on the system.

'[[' syntax is newer and has more features. See https://mywiki.wooledge.org/BashFAQ/031

As long as you're using bash, use the newer '[[' syntax, but if you are limited to POSIX shell (sh) then use '['.

By the way, it looks like there are some spacing/indentation issues in the patch.