implement clippy suggestion to use `or_insert_with`
implement clippy suggestion to use `or_insert_with`

eminence/cargo,tshepang/cargo,rust-lang/cargo,eminence/cargo,nipunn1313/cargo,rustyhorde/cargo,vojtechkral/cargo,rust-lang/cargo,tsurai/cargo,vojtechkral/cargo,tshepang/cargo,tsurai/cargo,vojtechkral/cargo,rustyhorde/cargo,nipunn1313/cargo,rust-lang/cargo,rustyhorde/cargo,tsurai/cargo,rust-lang/cargo,nipunn1313/cargo,tsurai/cargo,tshepang/cargo,tsurai/cargo,vojtechkral/cargo,nipunn1313/cargo,rustyhorde/cargo,eminence/cargo,eminence/cargo,tshepang/cargo