Lint cleanup

[willbush]

Based on #124, but this time fewer pedantic lint fixes and cleaner git history.

[willbush]

@Ben-PH feel free to review too! (Github won't let me add you as a reviewer)

[Ben-PH]

I like it.

Minor, inconsequential nit, but the map_or_else functions might be able to use Path::display (similar to "instead of |s| s.to_string(), use str::to_string"), but you do you.

[willbush]

Minor, inconsequential nit, but the map_or_else functions might be able to use Path::display (similar to "instead of |s| s.to_string(), use str::to_string"), but you do you.

Not seeing a way to do that without dropping the ./ appended to the beginning of the path.

[Ben-PH]

Missed the ./ part. My mistake.

[infinisil]

LGTM, thanks!