What if it had a comment section where people could discuss these issues, like the PHP docs? What if it had a wiki, where people could collaborate on fixing them, like ArchWiki?
https://apidock.com/ruby/String/split
Though, considering how much information tends to get centralized in these comments, I think the wiki-like direction is the way to go. (I know anyone can edit MDN, but it's via github PRs rather than being able to make quick edits on the site.)
PS: MDN and MSDN are my favorite documentation sites.
I've pointed out errors a couple of times and they were corrected pretty quickly.
When I pointed out some bugs on Microsoft's docs they just basically replied "hurry up and fix them then!" which annoyed me at first, but they actually poked me until I stopped being lazy and submitted a PR, wherein I actually learned some new things.