I find a lot of typos in documentation and I never create a PR lest people think I am one of those people. They really do make things worse for everyone.
I both try and make these PRs, and appreciate others doing it! That's how things get better.
What makes things worse for everyone is little documentation cobbled together in 5min like the homework of a teen just before class.
Your genius code is useless in isolation.
"By the way, I also fixed a few typos in the documentation" is much better than making that your ONLY change.
Maybe this is too extreme but I cannot remember seeing a PR too small, and I've merged thousands.