When a file is opened by nvim with ft=man already set, and
"has('vim_starting')", ftplugin/man.vim calls
'execute 'file man://'.ref', this causes nvim to display something like
this:
````
"<name of original file>" 977, 41017C
"man://foo(1)" [Not edited] 977 lines --0%--
Press ENTER or type command to continue
````
This is annoying, because nothing of note has actually happened.
Use cases why you might want to read a man page from a file:
`MANPAGER='bash -c "nvim -c \"set ft=man\" </dev/tty <(col -bx)"' man git`
`nvim -c 'set ft=man' <(man -P cat git)`