bug#1512: 23.0.60; SPC, TAB during completion do not do word completion, prefix completion

[Stefan Monnier]

> Why "in the context of partial completion"? Emacs word completion is
> not (has never been) partial completion.  That's the point.

That's your interpretation.  The current interpretation is that SPC is
a variant of TAB which works similarly except that it stops completion
at a word boundary and adds a - or a SPC if that can enable completion.
This allows SPC to obey completion-styles.
Your interpretation basically implies that SPC can't obey
completion-styles.

> Emacs word completion (SPC),

> just like Emacs prefix completion (TAB) has always had, as part of its
> behavior, the display of a [No match] message when it cannot complete
> a word at a time or cannot complete a prefix.  That's part of what word
> and prefix completion mean.

To me the above tells me you don't want partial completion.  So turn
it off.  That's what completion-styles is for.  I changed the default
on purpose.


        Stefan