Add help how to automatically incorporate clang-format changes.
Add help how to automatically incorporate clang-format changes.

This does not require resolving conflicts or bloating the history.

root-mirror/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,karies/root,karies/root,karies/root,olifre/root,olifre/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,karies/root,olifre/root,olifre/root,karies/root,karies/root,root-mirror/root,karies/root,root-mirror/root,karies/root