Thanks. afaik, double spacing is a 'feature' a programmer added to a
text processing language - of the WYSIWUG kind, because program's such
as troff/nroff
didn't need them. They, rather it, understood that a period followed by
a space indicated the end of a sentence.

On 26/07/2020 18:39, Serhiy Storchaka wrote:
> Serhiy Storchaka <storchaka+cpython@gmail.com> added the comment:
>
> I think they are not required, but recommended.
>
> >From https://www.python.org/dev/peps/pep-0008/#comments:
>
>    You should use two spaces after a sentence-ending period in multi- sentence comments, except after the final sentence.
>
> >From https://www.python.org/dev/peps/pep-0012/#general:
>
>    You must adhere to the Emacs convention of adding two spaces at the end of every sentence.
>
> AFAIK in English typography the space after a sentence-ending period is longer than spaces between words. In other European typographies they have the same width.

I thought it was where type setters, classically, used the break between
the endings of a sentence - additional 'kerning' could be applied there.

Anyway - final question: does .rst reformat line-lingths, or does it
present everything literally - only adding ``embellishments``. I have
been thinking
it does both - and, yet another convention for sentence endings is to
always start a sentence on a new line (and two new-lines indicate
start of a paragraph.

However, for now - double-spaces will remain - and I hope to remember to
add my own :)

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