             }
             
             
-            // Headers with a simple value that can be merged
-        //
+        // Headers with a simple value that can be merged
         default:
             guard let headerKey = caseInsensitiveMap[key.lowercased()], let oldValue = headers[headerKey]?.first else {
                 set(key, value: value)

        // Determine how to handle the header (append or merge)
        switch(key.lowercased()) {
            
            // Headers with an array value (can appear multiple times, but can't be merged)
        //
        case "set-cookie":
            if let headerKey = caseInsensitiveMap[key.lowercased()] {
                headers[headerKey]? += value

            let newValue = oldValue + ", " + value.joined(separator: ", ")
            headers[headerKey]?[0] = newValue
        }
    }
    
    ///
    /// Creates an iterator of the underlying dictionary
    ///
    public func makeIterator() -> DictionaryIterator<String, Array<String>> {
        return headers.makeIterator()
    }
    
    ///
