fix an error completion of `cargo run --example`
fix an error completion of `cargo run --example`

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