[clang] [clang-format] Fix extraneous space in block comments ending with **/ (PR #190209)

[via cfe-commits]

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@@ -1588,6 +1588,15 @@ TEST_F(FormatTestComments, ReflowsComments) {
                "   long */",
                Style20);
 
+  auto Style80 = getLLVMStyleWithColumns(80);
+  Style80.PenaltyExcessCharacter = 10;
+  StringRef ClosingStars = "/**\n"
+                           " * This test verifies the special code path. It "
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frank-515 wrote:

 Updated.

  - Switched the test to `verifyFormat`.
  - Moved it to the end of `ReflowsComments`.

  I also tried to reduce it enough to reuse `Style20`, but I couldn't find a smaller case that still reproduces this reliably. The current `ColumnLimit: 80` + `PenaltyExcessCharacter = 10` setup is the original reproducer and still
  seems to be the most stable one for this bug.

https://github.com/llvm/llvm-project/pull/190209