Fix for out_path only working for directories

[pgunnink]

Now out_path creates the right file, see #383. All tests but 3 pass, but those were not working before on my system. All behavior should thus be the same.

[pgunnink]

I now see that the Julia formatter has changed all the formatting in the Weave.jl file, but I am not sure how to fix that... I'll look into it later if that is a problem.

[aviatesk]

Can you please remove the changes made by formatter ? I'd like to keep the style consistent with the other parts of code base (especially whitespaces around kwargs)

[pgunnink]

Sure thing, formatting should now be correct.

[aviatesk]

Thanks for your contribution !