[PATCH] D111457: [clang][test] Add lit helper for windows paths

[Reid Kleckner via Phabricator via cfe-commits]

rnk added a comment.

These seem like generic substitutions that would be useful to anyone writing lit tests. We already have `%{pathsep}`:
https://llvm.org/docs/CommandGuide/lit.html#substitutions

These should live there as well, and be documented similarly, I think.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D111457/new/

https://reviews.llvm.org/D111457