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To be fair, these are all excerpts from a Twitter thread where the tweet author was just trying to informally drop some knowledge to people who were asking about the types in question and therefore probably know where to go for the documentation.

Those links would be a great addition to the article, though.

For example:

https://doc.rust-lang.org/std/fmt/struct.Formatter.html#meth...

The entire Rust standard library documentation (like most documentation for Rust software, it's built with the same tools) has a Search UI at the top.

https://doc.rust-lang.org/std/

In my fork of the article, I added documentation links and ordered the sections more sensibly: https://github.com/andrewarchi/compiler-notes/blob/main/rust...