syntax::parse::parser: convert unnecessary '&mut self's to '&self'.
syntax::parse::parser: convert unnecessary '&mut self's to '&self'.

graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust