message: fixed dropped 's' in trait.
  Grammatical change from singular to plural.
diff: //! # The prelude
  //!
  //! Importing each trait individually can become a chore, so we provide a
  -//! `prelude` module to allow you to import the main trait all at once. For
  +//! `prelude` module to allow you to import the main traits all at once. For
  //! example:
  //!
  //! ```rust
  