Keyword completion list: uppercase or lowercase? (was: Shower thought: submit an IETF RFC to register Org as a MIME type)

[Ihor Radchenko <yantar92@gmail.com>]

Carlos Pita <carlosjosepita2@gmail.com> writes:

>>> But then c-a-p is very lenient since it lists lower and upper case block
>>> variants even when I typed a lower case prefix, and upper case usually
>>> will go first in the list, hence promoting a seemingly bad practice.
>>
>> Could you clarify what is "c-a-p"?
>
> Yes, I just meant completion-at-point. At least some org functions,
> which I believe are implemented using pcomplete and then exposed through
> the completion-at-point interface, provide completions in both lower and
> uppercase variants and except when completion-ignore-case is nil (not
> the default) uppercase candidates will be sorted first in the list.
> It's often quite inconvenient to scroll down a completion menu to pick
> the lowercase completion for a short prefix, which either promotes using
> the uppercase variant at hand or offsets the benefits of
> autocompletion. Moreover, popular external collections of snippets have
> already adopted the lowercase convention of org-mode, hence introducing
> inconsistency in the document when one mixes both sources of completion
> (lowercase snippets and org-mode uppercase completions). So perhaps
> uppercase completions should be provided only when the user explicitly
> typed an uppercase prefix. What do you think?

I just tried with clean Emacs:

#+beg<complete -> #+begin_<complete> -> list of completions, all in lower case
#+BEG<complete -> #+BEGIN_<complete> -> list of completions, all in upper case

Seems to be all right.

Can you provide a more concrete example when you are given both
uppercase and lowercase completions?

Best,
Ihor