[clang] [Clang] Fix the printout of CXXParenListInitExpr involving default arguments (PR #130731)

[Shafik Yaghmour via cfe-commits]

https://github.com/shafik approved this pull request.

LGTM, I am a bit discouraged that this did not alter an tests.

https://github.com/llvm/llvm-project/pull/130731