Rust library for diplaying Options.

Usage

```rust use show_option::prelude::*;

println!("received bytes: {}", None::.showor("none")); // "received bytes: none" println!("amount: {}", Some(20).showprefixedor("$", "-")); // "amount: $20" println!("amount: {}", formatoption!(Some(20), "${}", "-")); // "amount: $20" ```