MewBot and spaces
Eiríkr, maybe you could consider copying/editing some of your explanation into the "Usage notes" section of our entry about the space, which has none of that information.
That's an interesting suggestion. I'm chewing on how best to present the information within the context of the entry. I'll take a stab at it later, and the community can rework as appropriate.
It occurs to me that the information in my previous post might be too encyclopedic. There is the Wikipedia article, after all, and it goes into the details. @CodeCat, in case you're interested, there's a section on sentence spacing (Space_(punctuation)#Spaces_between_sentences), and even a whole article on sentence spacing (Sentence spacing), which I only just discovered thanks to Daniel's link (and then clicking through from there).
For the usage notes on the ]space[ entry, would it make more sense to just direct the reader to Wikipedia?
Yes, I suppose just directing the reader to Wikipedia sounds good enough.
Maybe with a quick note so that readers know what should they expect, like "there's some difference in the treatment of spaces between sentences, see more at (Wikipedia link)".