Using dirvish-20250504.807...

In a git repo, and in the top-level directory, I have a symlink to a directory that's outside the repo (contains documentation that has its own vc). When dirvish-vc-preview runs in the symlinked dir, all the vc overlays say fatal: '/blah/blah/symlinked-dir/file' is outside repository at '/blah/blah/'. Those should be suppressed, IMO. Should be easy to reproduce.