mozilla/rust — pull request #9153 by alexcrichton (2013-09-13 03:04:50+00:00)
Title: Simplify format and document related macros

This follows from the discussion in #9012.

* All macros are now defined in terms of `format_args!` allowing for removal of a good bit of code in the syntax extension
* The syntax extension is now in a more aptly-named file, `format.rs`
* Documentation was added for the `format!`-related macros.