check indentation of braces in namespace decls, and the comments that often appear with them. This is my penance for messing up the indentation with clang-tidy-modernize-namespaces. As such I have limited it to new-style namespaces for now, and the check is off by default. Change-Id: I4db7f10a81c79bc0eece8f8e3ee564da8bc7f168 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/87723 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>