bug#60034: comment character for org and python includes a space

[Stefan Monnier]

>>> > How is it that the comment character for org and python include a
>>> > space "# ", when for all other languages it is only a single
>>> > character?

FWIW, both options are valid and they lead to different results
when you do `M-;` (as well as as when `-comment-add` is 0).

E.g. ELisp uses ";" rather than "; " so that you can do `M-; ; hello` to
add a comment of the form `;; hello` at the end of the current line.

In modes where using repetitions of the comment char is unusual
(typically because indentation rules don't pay attention to the number
of consecutive comment chars), it's more common to add a space at the
end of `comment-start`.


        Stefan