[clangd] Improve output of semantic highlighting tests in case of failures
Summary:
Instead of matching lists of highlightings, we annotate input code with
resulting highlightings and diff it against the expected annotated input.
In case of failures, this produces much nicer output in form of text-based
diffs.
Reviewers: hokein
Reviewed By: hokein
Subscribers: nridge, MaskRay, jkorous, arphaman, kadircet, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D67274
git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@371373 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed
