Subject: 28.0.50; Incorrect username completion results reported by `read-file-name-internal`

From: Daniel Mendler <[email-masked]>
Date: Fri, 30 Jul 2021 00:17:47 +0200

`(all-completions "~/.config/~man" #'read-file-name-internal)` returns
the list `("/.config/~man")`. The file completion table incorrectly
recognizes "/.config/~man" as the username instead of only "~man".