Sorry for the rant below, feel free to ignore it. However, I will say this once at least.
And thanks for the suggestion to try to fix it myself.
I've tried before to submit many fixes, PRs, issues, but have had a bad experience with the following repositories: rust-lang/{rust, reference, book}, /cognitive-engineering-lab/rust-book.
Not because anyone was rude, but because it takes very long to get a single comment, and maybe a month to merge a typo (sp. true with the book).
I've read all the contributing guides (for each of those repositories), ways to test and format etc, so this was frustrating for me.
It feels like given the effort it takes to get things how the repository owners like it, and submitting a fix, our time isn't valued. If no one can review, then I only submit issues, not fixes.
I know each has some reason why they wouldn't be able to review fast: not many reviewers, or book needs to be published first or whatever. However, submitting a fix that takes months to be looked at is disrespectful of the contributor's time as well. This side is normally ignored.
The communication is much better here luckily.
So what I do, from now on, is simply to raise issues, and they can decide whether it's relevant.
For this particular case, the response was mild and un-enthusiastic to say the least.