anchor.diff:  
     /// Whether this number is numerically smaller than [other].
     ///
  -  /// Returns `true` if this number is smaller than [other],
  -  /// and returns `false` if this number is greater than or equal to [other]
  +  /// Returns `true` if this number is smaller than [other].
  +  /// Returns `false` if this number is greater than or equal to [other]
     /// or if either value is a NaN value like [double.nan].
     bool operator <(num other);
   
     /// Whether this number is numerically smaller than or equal to [other].
     ///
  -  /// Returns `true` if this number is smaller than or equal to [other],
  -  /// and returns `false` if this number is greater than [other]
  +  /// Returns `true` if this number is smaller than or equal to [other].
  +  /// Returns `false` if this number is greater than [other]
     /// or if either value is a NaN value like [double.nan].
     bool operator <=(num other);
   
     /// Whether this number is numerically greater than [other].
     ///
  -  /// Returns `true` if this number is greater than [other],
  -  /// and returns `false` if this number is smaller than or equal to [other]
  +  /// Returns `true` if this number is greater than [other].
  +  /// Returns `false` if this number is smaller than or equal to [other]
     /// or if either value is a NaN value like [double.nan].
     bool operator >(num other);
   
     /// Whether this number is numerically greater than or equal to [other].
     ///
  -  /// Returns `true` if this number is greater than or equal to [other],
  -  /// and returns `false` if this number is smaller than [other]
  +  /// Returns `true` if this number is greater than or equal to [other].
  +  /// Returns `false` if this number is smaller than [other]
     /// or if either value is a NaN value like [double.nan].
     bool operator >=(num other);
   
  -  /// Whether the number is a Not-a-Number value.
  +  /// Whether this number is a Not-a-Number value.
     ///
     /// Is `true` if this number is the [double.nan] value
     /// or any other of the possible [double] NaN values.
  
positive.code:   /// and [isNaN].
    bool get isInfinite;
  
    /// Whether the number is finite.
    ///
    /// The only non-finite numbers are NaN values, positive infinity, and
    /// negative infinity. All integers are finite.
  
negative.code:   /// This precludes a NaN value like [double.nan] from being negative.
    bool get isNegative;
  
    /// Whether this number is positive infinity or negative infinity.
    ///
    /// Only satisfied by [double.infinity] and [double.negativeInfinity].
    ///
  