RE: select yank via completion

[Drew Adams]

> > It took decades to even get `SPC' to be self-inserting for
> > `read-file-name'.  I raised the same issue for `completing-read' at
> > that time (and before then).
> 
> So now a new patch let-binds (minibuffer-completing-file-name t)
> around completing-read to allow inserting SPC, problem solved:

FWIW, I can't believe you'd think that's the right
solution.  There's no file-name completion here.

The proper solution is to fix the non-file-name
completion keymaps, to let SPC self-insert like
any other ordinary char.