Fix spacings in `typography.dart`, `navigation_bar.dart` and `modal_barrier.dart` (#102136)

packages/flutter/lib/src/material/navigation_bar.dart

@@ -134,8 +134,8 @@ class NavigationBar extends StatelessWidget {
 
   VoidCallback _handleTap(int index) {
     return onDestinationSelected != null
-        ? () => onDestinationSelected!(index)
-        : () {};
+      ? () => onDestinationSelected!(index)
+      : () {};
   }
 
   @override

packages/flutter/lib/src/widgets/modal_barrier.dart

@@ -276,7 +276,6 @@ class _ModalBarrierSemanticsDelegate extends SemanticsGestureDelegate {
   }
 }
 
-
 class _AnyTapGestureRecognizerFactory extends GestureRecognizerFactory<_AnyTapGestureRecognizer> {
   const _AnyTapGestureRecognizerFactory({this.onAnyTapUp});