Update documentation and auth dict submissions

src/components/structures/auth/Registration.js

@@ -248,8 +248,7 @@ export default createReactClass({
             // need to.
             if (!this.state.doingUIAuth) {
                 await this._makeRegisterRequest(null);
-                // This should never succeed since we specified an empty
-                // auth object.
+                // This should never succeed since we specified no auth object.
                 console.log("Expecting 401 from register request but got success!");
             }
         } catch (e) {

src/components/views/auth/InteractiveAuthEntryComponents.js

@@ -740,7 +740,7 @@ export const FallbackAuthEntry = createReactClass({
             event.data === "authDone" &&
             event.origin === this.props.matrixClient.getHomeserverUrl()
         ) {
-            this.props.submitAuthDict(null);
+            this.props.submitAuthDict({});
         }
     },