[Updated] D10504: dirstateguard: use mktemp-like functionality to generate the backup filenames

[Alphare (Raphaël Gomès)]

This revision now requires changes to proceed.
Alphare requested changes to this revision.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D10504/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D10504

To: spectral, #hg-reviewers, Alphare
Cc: Alphare, mercurial-patches
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