message: Clarify what "newer versions of Rust" applies to
diff: @@ -324,7 +324,7 @@ pub trait Float
  fn signum(self) -> Self;
  /// Returns `true` if `self` is positive, including `+0.0`,
  - /// `Float::infinity()`, and `f64::NAN` with newer versions of Rust.
  + /// `Float::infinity()`, and with newer versions of Rust `f64::NAN`.
  ///
  /// ```
  /// use num_traits::Float;
  @@ -342,7 +342,7 @@ pub trait Float
  fn is_sign_positive(self) -> bool;
  /// Returns `true` if `self` is negative, including `-0.0`,
  - /// `Float::neg_infinity()`, and `-f64::NAN` with newer versions of Rust.
  + /// `Float::neg_infinity()`, and with newer versions of Rust `-f64::NAN`.
  ///
  /// ```
  /// use num_traits::Float;
  