Docs feedback: Custom server-side Git hooks doc is wrong

https://docs.gitlab.com/12.1/ce/administration/custom_hooks.html#create-a-custom-git-hook-for-a-repository

Unfortunately this documentation is wrong: it mentions that the hooks directory in the repo of a project is symlinked to the gitlab-shell's global hooks directory but this is not the case (or not anymore).

Take a look at this example directory listing on the the server-side:

$ ls -lad /var/opt/gitlab/git-data/repositories/group/project.git/hooks
drwxr-xr-x 2 git git 4096 Aug 21 21:42 /var/opt/gitlab/git-data/repositories/group/project.git/hooks

This is not a symlink but a directory which contains sample git hook files...

So there are two possibilities here, either the documentation is plain wrong and has not been updated, or the custom server-side git hooks are not working correctly anymore.

I have tested this with GitLab CE 12.1.6.

Thank you in advance for sorting this out and fixing the documentation and/or GitLab custom server-side git hooks.