bug#38529: Make --ad-hoc the default for guix environment proposed deprecation mechanism

[Ricardo Wurmus]

zimoun <address@hidden> writes:

>  - I propose the name "guix shell"

This is not a bad idea, especially considering that “guix environment”
was meant to get shebang support, so that you could use it as the
interpreter in a script that handles the environment configuration.

It is also shorter.

--
Ricardo