         :param: grantType The name of the grant type
         :param: parameters The required parameters for the custom grant type
     
-        :returns: A `SignalProducer` that, when started, creates and sends a
-            signal that completes when the request finishes successfully or
-            sends an error of the request finishes with an error.
+        :returns: A `SignalProducer` that, when started, creates a signal that
+            completes when the request finishes successfully or sends an error
+            if the request finishes with an error.
     */
     public func requestAccessToken(#grantType: String, parameters: [ String : String ]) -> SignalProducer<Void, NSError> {
         return SignalProducer { observer, disposable in

        :param: request An unauthenticated NSURLRequest.

        :returns: A signal that sends the authenticated request on success or
            an error when the request could not be authenticated.
    */
    @objc
    public func RH_authenticateRequest(request: NSURLRequest) -> RACSignal {

        :param: password The resource owner's password.

        :returns: A signal that sends a `RACUnit` and completes when the
            request finishes successfully or sends an error if the request
            finishes with an error.
    */
    @objc
