[PATCH] D133093: [clang-format] Fix a bug in merging blocks with a wrapped l_brace

[Owen Pan via Phabricator via cfe-commits]

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When the opening brace of a control statement block is wrapped, we must check the previous line to determine whether to try to merge the block.

Fixes https://github.com/llvm/llvm-project/issues/38639.
Fixes https://github.com/llvm/llvm-project/issues/48007.
Fixes https://github.com/llvm/llvm-project/issues/57421.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133093

Files:
  clang/lib/Format/UnwrappedLineFormatter.cpp
  clang/unittests/Format/FormatTest.cpp

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