Add an underscore between a literal value and its suffix.
Add an underscore between a literal value and its suffix.

https://github.com/rust-lang-nursery/rust-clippy/wiki#unseparated_literal_suffix

stoklund/cretonne,sunfishcode/cretonne,stoklund/cretonne,sunfishcode/cretonne,sunfishcode/cretonne,stoklund/cretonne