[PATCH] D66574: [lit] Make internal diff work in pipelines

[Joel E. Denny via Phabricator via llvm-commits]

jdenny added a comment.

In D66574#1643790 <https://reviews.llvm.org/D66574#1643790>, @jdenny wrote:

> I made several changes:
>
> - Added missing `functools`




- ... import to `diff.py`.
- Extracted `-` implementation.  I'll put that in a separate patch to make it easier to review.
- Fixed some missing newlines in diagnostics (bugs I introduced when converting from exceptions).
- Cleaned up some tests.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66574/new/

https://reviews.llvm.org/D66574