D7867: rust-hg-path: add useful methods to `HgPath`

[Alphare (Raphaël Gomès)]

Alphare added inline comments.

INLINE COMMENTS

> martinvonz wrote in hg_path.rs:173
> Another way of thinking about my question: what happens if we never call this function? Which tests fail?

This is currently this only place it's called (line 189), it was refactored for readability first I suppose.

REPOSITORY
  rHG Mercurial

BRANCH
  default

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7867/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7867

To: Alphare, #hg-reviewers, kevincox, pulkit
Cc: martinvonz, durin42, kevincox, mercurial-devel