[clang] [clang-format] Fix a bug in `ReflowComments: Always` (PR #146202)

[Owen Pan via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/146202

Fixes #39150

>From 00c0c25a5f17a0077cfc86600203888891684aa5 Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Sat, 28 Jun 2025 00:25:02 -0700
Subject: [PATCH] [clang-format] Fix a bug in `ReflowComments: Always`

Fixes #39150
---
 clang/lib/Format/BreakableToken.cpp           | 3 +--
 clang/unittests/Format/FormatTestComments.cpp | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/clang/lib/Format/BreakableToken.cpp b/clang/lib/Format/BreakableToken.cpp
index 5317c05f3a460..def0d73e77539 100644
--- a/clang/lib/Format/BreakableToken.cpp
+++ b/clang/lib/Format/BreakableToken.cpp
@@ -158,8 +158,7 @@ getCommentSplit(StringRef Text, unsigned ContentStartColumn,
       return BreakableToken::Split(StringRef::npos, 0);
     StringRef BeforeCut = Text.substr(0, SpaceOffset).rtrim(Blanks);
     StringRef AfterCut = Text.substr(SpaceOffset);
-    // Don't trim the leading blanks if it would create a */ after the break.
-    if (!DecorationEndsWithStar || AfterCut.size() <= 1 || AfterCut[1] != '/')
+    if (!DecorationEndsWithStar)
       AfterCut = AfterCut.ltrim(Blanks);
     return BreakableToken::Split(BeforeCut.size(),
                                  AfterCut.begin() - BeforeCut.end());
diff --git a/clang/unittests/Format/FormatTestComments.cpp b/clang/unittests/Format/FormatTestComments.cpp
index 5eefd767706a3..a16fbffb76270 100644
--- a/clang/unittests/Format/FormatTestComments.cpp
+++ b/clang/unittests/Format/FormatTestComments.cpp
@@ -2486,7 +2486,7 @@ TEST_F(FormatTestComments, BlockComments) {
   EXPECT_EQ("/*\n"
             "**\n"
             "* aaaaaa\n"
-            "*aaaaaa\n"
+            "* aaaaaa\n"
             "*/",
             format("/*\n"
                    "**\n"