New comment by heliocat on void-packages repository

https://github.com/void-linux/void-packages/pull/15836#issuecomment-801678384

Comment:
Shouldn't `test "$(readlink -f root/usr/bin/file)" = "pkg-b-file"` be `test "$(readlink root/usr/bin/file)" = "pkg-b-file"`? `realpath`/`readlink -f` will fully canonicalize the path and return an absolute which won't then pass the string equality test. I'll give the test a better pass when I've got some more time but I think there are a few logic issues in there.