         case string(String)
         case inlineCss([CSSProperty])
 
-        
+
         // MARK: - Constants
 
         static let cssPropertySeparator = "; "

    }
}

// MARK: - Attribute.Value

extension Attribute {

        return name.hashValue ^ value.hashValue()
    }

    // MARK: - NSCoding

    public required convenience init?(coder aDecoder: NSCoder) {
        guard let name = aDecoder.decodeObject(forKey: Keys.name) as? String,
            let valueAsString = aDecoder.decodeObject(forKey: Keys.value) as? String?
        else {
            fatalError()
        }

        let value = Value(string: valueAsString)
        self.init(name: name, value: value)
    }

    // MARK: - Equatable

    static func ==(lhs: Attribute, rhs: Attribute) -> Bool {
