[clang] [clang-format] Introduce "ReflowComments: IndentOnly" to re-indent comments without breaking internal structure (think Doxygen). (PR #96804)

[Iuri Chaer via cfe-commits]

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@@ -493,9 +493,25 @@ TEST_F(FormatTestComments, AlignsBlockComments) {
 
 TEST_F(FormatTestComments, CommentReflowingCanBeTurnedOff) {
   FormatStyle Style = getLLVMStyleWithColumns(20);
-  Style.ReflowComments = false;
-  verifyFormat("// aaaaaaaaa aaaaaaaaaa aaaaaaaaaa", Style);
-  verifyFormat("/* aaaaaaaaa aaaaaaaaaa aaaaaaaaaa */", Style);
+  Style.ReflowComments = FormatStyle::RCS_Never;
+  verifyNoChange("// aaaaaaaaa aaaaaaaaaa aaaaaaaaaa", Style);
+  verifyNoChange("/* aaaaaaaaa aaaaaaaaaa aaaaaaaaaa */", Style);
+  verifyNoChange("/* aaaaaaaaa aaaaaaaaaa aaaaaaaaaa\naaaaaaaaa*/", Style);
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ichaer wrote:

I like that, I've done the same for `CommentReflowingCanApplyOnlyToIndents`. The clang-format rules for the project mean `Style` had to go on the next line, though.

https://github.com/llvm/llvm-project/pull/96804