It seems the behaviour of the default opener (xdg-open) varies across platforms
and environments. Details are documented in the issue. To prevent an empty file
from being accidentally opened leading to unexpected behaviour, we are adding a
guard with the message that the empty file should be opened using edit or open
option.

Milis Linux support

Milis Linux support

E.g. BSD curses.

- Add BSD
 - Raspberry Pi is not an OS
 - Non-exhaustive

Hardly a person to use macOS and this familiar with homebrew search by homebrew