Does Lemmy need the double space? This isn’t Reddit after all, and it’s the only Markdown implementation I’ve seen with that requirement for line breaks.

and my keyboard unironically took my double-tap on space to add periods for me!

Markdown also permits a trailing backslash to be a linebreak, as an alternative to the two trailing spaces.

foo\
bar

yields

foo
bar

No, baron, I was just pointing out that there are lots of different rules depending on the medium and genre and participants. le sigh