bug#50959: 28.0.50; Shorthand symbols are unknown to Emacs

[Eli Zaretskii]

> From: João Távora <joaotavora@gmail.com>
> Cc: psainty@orcon.net.nz,  50959@debbugs.gnu.org
> Date: Sat, 02 Oct 2021 12:54:13 +0100
> 
> 0. no integration
> 
> 1. This is the current integration.  I.e. when C-h o is pressed on the
>    symbol the global name is discovered and used as the default.  This
>    is how SLIME work with CL's namespacing system.  SLIME is a very well
>    tested and widely appreciated Common Lisp IDE for Emcas.
> 
> 2. The shorthands from the buffer where the minibuffer was entered are
>    _not_ in the completions list, but typing one of them interns the
>    symbol with those shorthands present, so you get the desired result.
>    This would fix Phil's visually-copy-and-type scenario.
> 
> 3. (Eli's suggestion): the completion list would be augmented with the
>    shorthands from the buffer where the minibuffer was entered from.

Are 2 and 3 significantly different (from the implementation POV)?