Make Assert::command and with_args take AsRef<OsStr> args

[luser]

First off, I just learned about assert_cli today and I'm excited to start using it!

All of the methods on std::process:Command for the executable name and commandline arguments take T: AsRef<OsStr>, so you can pass &str but also &Path and other useful things. It would be nice if Assert::command and Assert::with_args took the same type of arguments so that users could pass in a larger variety of types.

Specifically, I have the path to the executable I want to run as a PathBuf, so I can't pass it directly.

This will require Assert to store cmd as Vec<OsString> instead of Vec<String>, but it shouldn't cause any issues.

[epage]

Thanks for the feedback!

I agree that it'd be a good thing for us to make the API more accepting of different string types, much like what was done with Environment.

[killercup]

Yep, we should take AsRef<OsStr>!