[clang-tools-extra] [clang-doc] [feat] add --repository-line-prefix argument (PR #131280)

[Paul Kirth via cfe-commits]

ilovepi wrote:

The branch has conflicts that need to be resolved. 

While its not a problem, we typically wait for 1 week between reviews to "ping" a reviewer. https://llvm.org/docs/CodeReview.html#lgtm-how-a-patch-is-accepted

https://github.com/llvm/llvm-project/pull/131280