D7503: rust-dirs: address failing tests for `dirs` impl with a temporary fix

[Alphare (Raphaël Gomès)]

Alphare added a comment.


  In D7503#110345 <https://phab.mercurial-scm.org/D7503#110345>, @yuja wrote:
  
  > Many unhandled results:
  
  Ah sorry, the cargo compilation cache hid those warnings from me, I usually catch them.
  
  > Might be better to do `path.check_state()` in cpython layer, and insert
  > `debug_assert` to hg-core.
  
  That would be cleaner for the current purposes, but using `debug_assert` in `hg-core` indicates to me that we want the Rust code to not worry about checking for consecutive slashes in `dirs`, because we would have the `pathauditor`. Am I correct?

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To: Alphare, #hg-reviewers
Cc: yuja, marmoute, durin42, kevincox, mercurial-devel