   /// **Mechanica**
   ///
   /// Returns a `new` NSMutableAttributedString appending the right NSMutableAttributedString to the left NSAttributedString.
-  static public func + (lhs: NSAttributedString, rhs: NSMutableAttributedString) -> NSMutableAttributedString {
+  public static func + (lhs: NSAttributedString, rhs: NSMutableAttributedString) -> NSMutableAttributedString {
     let a = NSMutableAttributedString(attributedString: lhs)
     return a + rhs
   }

  /// **Mechanica**
  ///
  /// Returns a `new` NSMutableAttributedString appending the right String to the left NSMutableAttributedString.
  static public func + (lhs: NSMutableAttributedString, rhs: String) -> NSMutableAttributedString {
    let a = lhs.mutableCopy() as! NSMutableAttributedString
    let b = NSMutableAttributedString(string: rhs)
    return a + b

  /// **Mechanica**
  ///
  /// Returns a `new` NSMutableAttributedString appending the right NSMutableAttributedString to the left String.
  public static func + (lhs: String, rhs: NSMutableAttributedString) -> NSMutableAttributedString {
    let a = NSMutableAttributedString(string: lhs)
    let b = rhs.mutableCopy() as! NSMutableAttributedString
    return a + b
