message: subeset -> subset.
diff: @@ -232,7 +232,7 @@ impl<S: fmt::Debug> fmt::Debug for Basis2<S> {
  /// The matrix is guaranteed to be orthogonal, so some operations, specifically
  /// inversion, can be implemented more efficiently than the implementations for
  /// `math::Matrix3`. To ensure orthogonality is maintained, the operations have
  -/// been restricted to a subeset of those implemented on `Matrix3`.
  +/// been restricted to a subset of those implemented on `Matrix3`.
  #[derive(PartialEq, Copy, Clone)]
  #[cfg_attr(feature = "rustc-serialize", derive(RustcEncodable, RustcDecodable))]
  #[cfg_attr(feature = "eders", derive(Serialize, Deserialize))]
  