bug#60379: [PATCH] Eglot: don't use "nil" as minibuffer initial input

[Eli Zaretskii]

> Date: Wed, 28 Dec 2022 14:22:17 +0200
> From:  Eshel Yaron via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Currently, doing emacs -Q and followed by M-x eglot in the scratch
> buffer results in a prompt for major mode to manage with LSP, but the
> initial minibuffer input as well as the default value for the
> completing-read call are both set to the string "nil", which is not very
> helpful as that's not a valid input.
> 
> This patch tweaks the prompt a little and avoids this issue by leaving
> the minibuffer's initial input empty and making sure we don't set the
> default value to "nil" either.

João, are you looking into this?  WDYT?