[PATCH] D55245: [clang-tidy] Add the abseil-duration-subtraction check

[Hyrum Wright via Phabricator via cfe-commits]

hwright marked an inline comment as done.
hwright added a comment.

I've updated the documentation, and the rebased to `master`.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55245/new/

https://reviews.llvm.org/D55245