[clang] [clang-format] Merge case alignment into AlignTokens (PR #187811)

[via cfe-commits]

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@@ -548,7 +557,8 @@ static unsigned AlignTokens(const FormatStyle &Style, F &&Matches,
 
   unsigned I = StartAt;
   const auto E = Changes.size();
-  for (; I != E; ++I) {
+  for (const auto LoopEnd = E - (Strategy == AlignStrategy::CaseBody ? 1 : 0);
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owenca wrote:

```suggestion
  for (const auto LoopEnd = Strategy == AlignStrategy::CaseBody ? E - 1 : E;
```

https://github.com/llvm/llvm-project/pull/187811