clippy 0.0.41

A bunch of helpful lints to avoid common pitfalls in Rust
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#![feature(plugin)]
#![plugin(clippy)]

fn main() {
    let x = true;
    if x == true { true } else { false }; //~ERROR you can simplify this boolean comparison to `x`
    if x == false { true } else { false }; //~ERROR you can simplify this boolean comparison to `!x`
    if true == x { true } else { false }; //~ERROR you can simplify this boolean comparison to `x`
    if false == x { true } else { false }; //~ERROR you can simplify this boolean comparison to `!x`
}