             self.addAttribute(.font, value: font.altHalf, range: NSMakeRange(location, length))
         }
         self.endEditing()
+
+        guard negativeSpaceRatio == 0 else {
+            return self.kern(with: .bracketsBothSide(negativeSpaceRatio: negativeSpaceRatio))
+        }
         return self
     }
 


    case brackets(negativeSpaceRatio: CGFloat)

    fileprivate var setting: KerningSettings {

        switch self {

    }

    @discardableResult
    public func kernBrackets(negativeSpaceRatio: CGFloat = 0) -> Self {
        self.beginEditing()
        regexpBrackets.enumerateMatches(in: self.string, options: [], range: NSMakeRange(0, self.length)) { [weak self] (result, _, _) in
            guard let result = result, let `self` = self else { return }
