[PATCH] D127923: [Diagnostics] Accept newline and format diag opts on first line

[Vang Thao via Phabricator via cfe-commits]

vangthao created this revision.
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Accept newlines when the diagnostic string is being given by an outside source
instead of ignoring newlines. I believe the other processing done in
`FormatDiagnostic()` does not ignore newlines so we should also not ignore it
here.

Also format diagnostic options on the first line when there are multiple lines.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D127923

Files:
  clang/lib/Basic/Diagnostic.cpp
  clang/lib/Frontend/TextDiagnosticPrinter.cpp
  clang/lib/StaticAnalyzer/Core/TextDiagnostics.cpp
  clang/test/Analysis/padding_message.cpp

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