[clang] [libcxxabi] [llvm] [Clang] Mangling of pack indexing type and expression for itanium (PR #123513)

[Younan Zhang via llvm-commits]

================
@@ -4787,6 +4788,7 @@ void CXXNameMangler::mangleRequirement(SourceLocation RequiresExprLoc,
 
 void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
                                       bool AsTemplateArg) {
+  // clang-format off
----------------
zyn0217 wrote:

nit: Why turning it off?

https://github.com/llvm/llvm-project/pull/123513