format: format example app

Author: gonuit

example/lib/main.dart

@@ -38,8 +38,7 @@ class MyApp extends StatelessWidget {
         '/envelope': (context) => const EnvelopIndicatorScreen(),
         '/fetch-more': (context) => const FetchMoreScreen(),
         '/horizontal': (context) => const HorizontalScreen(),
-        '/programmatically-controlled': (context) =>
-            const ProgrammaticallyControlled(),
+        '/programmatically-controlled': (context) => const ProgrammaticallyControlled(),
       },
     );
   }
@@ -86,8 +85,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child:
-                    const Text("Custom Material Indicator"),
+                child: const Text("Custom Material Indicator"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,