Put match arm guard on the next line if it contains new line
Put match arm guard on the next line if it contains new line

SingingTree/rustfmt,graydon/rust,graydon/rust,rust-lang/rustfmt,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,rust-lang/rustfmt,aidancully/rust,SingingTree/rustfmt