Fix perlis quote
Fix perlis quote

Thanks @silentbicycle

dskecse/rust_for_rubyists,gpbonillas/rust_for_rubyists,dskecse/rust_for_rubyists,steveklabnik/rust_for_rubyists,gpbonillas/rust_for_rubyists,dskecse/rust_for_rubyists,steveklabnik/rust_for_rubyists,steveklabnik/rust_for_rubyists,gpbonillas/rust_for_rubyists