rust-lang/rust — pull request #16416 by nick29581 (2014-08-11 10:15:19+00:00)
Title: Accept empty log level

Previously we would accept an empty log level without an equals sign, but not with one. This addresses that minor nit. E.g., `RUST_LOG=rustc::middle::trans=` will work the same as `RUST_LOG=rustc::middle::trans`.