This is a small pet project evolving from the Rust Book's
I/O project.
The goal is to learn things via unnecessary tweaks for readability, performance,
and preference. For example: no for loops! Only iterators and idiomatic error
handling. It was painful, but I learned a lot from it.
You can see what I want to change by searching for the "@" symbol, e.g. @perf for increasing performance. (I had tests at one point, but they disappeared as I got more and more stuck with iterators; they'll come back when I've cooled off.)