Replace Option<Vec<&'a ast::pat>> with Vec<&'a ast::Pat>
Replace Option<Vec<&'a ast::pat>> with Vec<&'a ast::Pat>

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