[PATCH] D142604: [Clang] Fix __VA_OPT__ implementation so that it treats the concatenation of a non-placemaker token and placemaker token as a non-placemaker token

[Shafik Yaghmour via Phabricator via cfe-commits]

shafik updated this revision to Diff 498510.
shafik added a comment.

- Add release note


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142604/new/

https://reviews.llvm.org/D142604

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/Lex/TokenLexer.cpp
  clang/test/Preprocessor/macro_vaopt_p1042r1.cpp

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