Create rustfmt tool, ala gofmt

[brson]

Being opinionated and strict about syntax is becoming popular, and the Go community has a culture of formatting all their code the same with gofmt. Rust has a pretty printer built into the compiler, but it doesn't always produce the best output, isn't 100% reliable, and isn't wired up to an end-user tool.

This will involve creating a command line interface to the pretty printer and fixing pretty-printer deficiencies. The pretty printer is notoriously difficult to control in some cases and is not passionately maintained, so it may be profitable to do a refactor and/or rewrite. Investigating how gofmt is structured could be helpful.

See also: 3195

[icholy]

👍 gofmt is great

[brson]

Closing. Graydon is going to be working on this personally.