Code simplification

[hatahet]

The following code https://github.com/carlhuda/cargo/blob/master/src/bin/cargo-read-manifest.rs#L47-L49 can be re-written as:

for err in decoder.error.iter() {
    fail!("Error: {}", err);
}

or

decoder.error.map(|err| fail!("Error: {}", err));

[wycats]

Thanks for the help! Keep it coming 😄

This code has since been changed.