docs: Fix a few typos

[timgates42]

trafficstars

There are small typos in:

• libc/stdio/appendr.c
• third_party/infozip/zip/api.c
• third_party/quickjs/qjscalc.js
• third_party/stb/stb_image.c

Fixes:

• Should read occurrence rather than occurance.
• Should read guaranteed rather than guarranteed.
• Should read guarantee rather than guarante.
• Should read function rather than fonction.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

[jart]

Hey @timgates42 I noticed you're writing an automated GitHub refactoring tool. I'm a big supporter of what you're doing. I actually wrote a blog post a few years ago, which you might enjoy reading. It's called Operation Rosehub and it talks about how much we need a tool like that in order to fix security issues at scale.

[timgates42]

Thanks @jart that's a great article. Wow! It seems like there might be a real opportunity for me to pull out the parts of my library responsible for scanning and submitting PRs into a separate library. The latest GitHub API means you can build PR contents without checking out the repository too which would be very time saving for such a large patch project like Operation Rosehub. Very inspiring, thanks for pointing this article out. I'll update this branch and send you the copyright as requested.