Aliases entirely undocumented

[Osspial]

Cargo has built-in aliases for cargo build, cargo test and cargo run, in the forms of cargo b, cargo t and cargo r. However, these aliases seems to have gone unmentioned in all of cargo's documentation, and I can't find any mention of them on rust-lang.org, crates.io, or cargo's help command. This is admittedly pretty low-priority as far as documentation holes go, but these aliases should get some mention in cargo's help command if not elsewhere.

[sfackler]

They are documented down in the bottom of the example .cargo/config here, but it's not particularly obvious: http://doc.crates.io/config.html#configuration-keys

[dwijnand]

Another URL is https://doc.rust-lang.org/cargo/reference/config.html#configuration-keys.

I (personally) don't have any specific ideas what should change, so maybe we can close this?

[dwijnand]

I'm going to close those on the basis that "entirely undocumented" isn't true.

But let us know if you have any suggestions on how to document them better.