Style fixes

Author: cloudwebrtc

example/lib/main.dart

@@ -140,19 +140,19 @@ class _MyAppState extends State<MyApp> {
             child: new Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-              new Text('Loopback demo.'),
-              new Container(
-                      width: 320.0,
-                      height: 240.0,
-                      child: new RTCVideoView(_localRenderer),
-              ),
-              new Text('Local video'),
-              new Container(
-                      width: 320.0,
-                      height: 240.0,
-                      child: new RTCVideoView(_remoteRenderer),
-              ),
-              new Text('Remote video'),
+                  new Text('Local video:'),
+                  new Container(
+                    width: 320.0,
+                    height: 240.0,
+                    child: new RTCVideoView(_localRenderer),
+                  ),
+
+                  new Text('Remote video:'),
+                  new Container(
+                    width: 320.0,
+                    height: 240.0,
+                    child: new RTCVideoView(_remoteRenderer),
+                  ),
             ])),
       ),
     );

lib/RTCVideoView.dart

@@ -145,10 +145,10 @@ class _RTCVideoViewState extends State<RTCVideoView> {
           child: (this.renderer._textureId == null || this.renderer._srcObject == null)
               ? new Container()
               : new Container(
-            width: width,
-            height: height,
-            child: new Texture(textureId: this.renderer._textureId),
-          )
-      );
+                      width: width,
+                      height: height,
+                      child: new Texture(textureId: this.renderer._textureId),
+                    )
+          );
   }
 }