[clang] [ClangFormat] Fix indent in child lines within a macro argument. (PR #82523)

[via cfe-commits]

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@@ -420,6 +420,8 @@ struct UnwrappedLineNode {
   SmallVector<UnwrappedLine, 0> Children;
 };
 
+std::ostream &operator<<(std::ostream &Stream, const UnwrappedLine &Line);
+
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r4nt wrote:

I can move the operator<< to the test header, but I'd then at least need some public method to do the printing.

https://github.com/llvm/llvm-project/pull/82523