message: README tweak
diff: @@ -48,8 +48,8 @@ in your program, and cannot run all programs:
  has no access to most platform-specific APIs or FFI. A few APIs have been
  implemented (such as printing to stdout) but most have not: for example, Miri
  currently does not support SIMD or networking.
  -* Miri currently does not check for data-races and most other concurrency
  - related issues.
  +* Miri currently does not check for data-races and most other concurrency-related
  + issues.
  [rust]: https://www.rust-lang.org/
  [mir]: https://github.com/rust-lang/rfcs/blob/master/text/1211-mir.md
  