src/tools/rustfmt/tests/source/mut_ref.rs

#![feature(mut_ref)]
fn mut_ref() {
    if let Some(mut /*a*/ ref     /*def*/  mut     /*abc*/       state)=          /*abc*/foo{
        println!(
"asdfasdfasdf");	}

if let Some(mut /*a*/ ref     /*def*/  /*mut*/       state)=          /*abc*/foo{
    println!(
"asdfasdfasdf");	}
}