[clang] Fix the double space and double attribute printing of the final keyword. (PR #88600)

[Erich Keane via cfe-commits]

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

2 nits, else LGTM.  Once you and @kimgr are in agreement with what to do next (and have looked into my nits), feel free to commit.


https://github.com/llvm/llvm-project/pull/88600