Make trailing directory backslash optional

Description

I'd like trailing directory backslashes to be optional. I've done it manually on my local machine, and IMO it looks cleaner (esp when listing a directory with many subdirectories).

It looks like:

At the moment a space is conjoined to the end of file paths and a slash is conjoined to directory paths. I was thinking a flag could be used to make them uniform, or something similar.

This is strictly speaking a duplicate, since it's been asked for in the cited issue. I'm not fussed about the other elements of that request, though, just the backslashes.

I'd be happy to give it a go if deemed valuable.

• Relevant Issues : #344
• Relevant PRs : (none)
• Type of issue :
  • Installation
  • Font-related
  • Feature request
  • Bug in existing feature
  • Developer mode : Code quality / Tests / Documentation