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

[Paul Kirth via cfe-commits]

ilovepi wrote:

The patch is mostly in good shape. However, there is a build error. you can see it in the premerge CI. looks like you need to update the initialization of the clang doc context objects.

Also you need to `git clang-format HEAD~` on your patch to get formatting check to pass. After that it will be ready to land.

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