Add more descriptive error to file loading

[TheBlackArroVV]

After trying to run it locally I found out, that an original error about the unavailability to run a file is not descriptive. So, I decided to add an error to make it more obvious.

[ZimbiX]

Resolves #280 and #282.

imo the begin block should be removed so that errors from the require path or required code can be shown normally. And perhaps requiring using the full path to the given file.

[TheBlackArroVV]

Hi, @ZimbiX,
Can you elaborate a bit about wdym? If you you mean just rendering a standard LoadError I think it's not gonna help with a problem I had, it would still be unclear how it should be used

[ZimbiX]

Something like:

args.each do |file|
  require whatever_method_returns_a_full_file_path(file)
end

That way, all forms of relative file path can be accepted. Then if an exception is raised due to the given file not existing, that should be pretty easy to understand already, I'd think.

Edit: Looks like File.expand_path or File.realpath does the trick

[TheBlackArroVV]

@ZimbiX, got it, makes sense
Can you check now?

[TheBlackArroVV]

Hey, @ZimbiX,
Cam you take a look?