[clang] [clang-format][NFC] Simplify some logic in BreakableLineCommentSection (PR #148324)

[Owen Pan via cfe-commits]

https://github.com/owenca created https://github.com/llvm/llvm-project/pull/148324

None

>From 88f34fb41704bdd6f6de743a5b467cdc3c938cc4 Mon Sep 17 00:00:00 2001
From: Owen Pan <owenpiano at gmail.com>
Date: Fri, 11 Jul 2025 18:18:18 -0700
Subject: [PATCH] [clang-format][NFC] Simplify some logic in
 BreakableLineCommentSection

---
 clang/lib/Format/BreakableToken.cpp | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/clang/lib/Format/BreakableToken.cpp b/clang/lib/Format/BreakableToken.cpp
index 24912c25ef8c6..c36cb74bc4501 100644
--- a/clang/lib/Format/BreakableToken.cpp
+++ b/clang/lib/Format/BreakableToken.cpp
@@ -927,14 +927,12 @@ BreakableLineCommentSection::BreakableLineCommentSection(
       }
 
       if (Lines[i].size() != IndentPrefix.size()) {
-        PrefixSpaceChange[i] = FirstLineSpaceChange;
+        assert(Lines[i].size() > IndentPrefix.size());
 
-        if (SpacesInPrefix + PrefixSpaceChange[i] < Minimum) {
-          PrefixSpaceChange[i] +=
-              Minimum - (SpacesInPrefix + PrefixSpaceChange[i]);
-        }
+        PrefixSpaceChange[i] = SpacesInPrefix + FirstLineSpaceChange < Minimum
+                                   ? Minimum - SpacesInPrefix
+                                   : FirstLineSpaceChange;
 
-        assert(Lines[i].size() > IndentPrefix.size());
         const auto FirstNonSpace = Lines[i][IndentPrefix.size()];
         const bool IsFormatComment = LineTok && switchesFormatting(*LineTok);
         const bool LineRequiresLeadingSpace =