Merge pull request #127 from jbr/copyedit-msrv

copyedit msrv text

README.md

@@ -52,11 +52,12 @@ This crate uses ``#![forbid(unsafe_code)]`` to ensure everything is implemented
 
 ## Minimum Supported Rust Version
 
-Given the rapidly improving nature of async Rust, only `async-h1` guarantees
-it will work on the latest stable Rust compiler. Currently `async-h1` should
-compiler on `rustc 1.40.0` and above, but we reserve the right to upgrade the
-minimum Rust version outside of major releases. If upgrading stable compiler
-versions is an issue we recommend pinning the version of `async-h1`.
+Given the rapidly-improving nature of async Rust, `async-h1` only
+guarantees it will work on the latest stable Rust compiler. Currently
+`async-h1` compiles on `rustc 1.40.0` and above, but we reserve the
+right to upgrade the minimum Rust version outside of major
+releases. If upgrading stable compiler versions is an issue we
+recommend pinning the version of `async-h1`.
 
 ## Contributing
 Want to join us? Check out our ["Contributing" guide][contributing] and take a