Stable Extend::extend_one alternative

[![crates.io](https://img.shields.io/crates/v/extend1.svg)][extend1] [![crates.io](https://img.shields.io/crates/d/extend1.svg)][extend1]

Alternative to [Extend::extend_one] that is stable and does not require #![feature(extend_one)].

Example

```rust use proc_macro2 as pm2; use extend1::Extend1;

let mut ts = pm2::TokenStream::new(); ts.extend1(pm2::Literal::string("Hello, world!")); asserteq!(ts.tostring(), "\"Hello, world!\""); ```

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.