> Maybe you're only loading a small configuration file, and so fetching it all in one go is better than dealing with a buffer.

If it's small, it can't be that much worse to buffer. What's wrong with reasonable defaults?

Can you tell me what it means to search for 'line' or 'lines' in rustdoc? Is this a command-line tool? I'm aware of the 'rustdoc' that generates documentation, but not of anything by that name that searches documentation, and Googling isn't turning up much of anything except the Rust book here.

It would be great to have an offline way to search Rust documentation and examples, as things like this make it very hard to write Rust on a plane, for example.

Googling often gives answers that are wrong or pre-1.0. You seem to have better luck at searching for the right things, perhaps because you are an expert in the language and know exactly what to search for.

(Amusing related anecdote: I googled for "how to return self in rust" and got a suicide prevention website. Jeez, Google, it's not that bad.)