https://rust-lang-nursery.github.io/edition-guide/rust-2018/data-types/field-init-shorthand.html find src -name '*.rs' -exec perl -pe 's/\b(\w+): \1,/$1,/g' -i {} \;
From `cargo fix --edition`, see https://rust-lang-nursery.github.io/edition-guide/print.html#the-crate-keyword-refers-to-the-current-crate