diff --git a/examples/flutter_gallery/lib/demo/colors_demo.dart b/examples/flutter_gallery/lib/demo/colors_demo.dart
index d27e704905..85d7b81706 100644
--- a/examples/flutter_gallery/lib/demo/colors_demo.dart
+++ b/examples/flutter_gallery/lib/demo/colors_demo.dart
@@ -117,7 +117,7 @@ class PaletteTabView extends StatelessWidget {
               );
             }),
         ],
-      )
+      ),
     );
   }
 }
diff --git a/examples/flutter_gallery/lib/demo/material/backdrop_demo.dart b/examples/flutter_gallery/lib/demo/material/backdrop_demo.dart
index 0d2c785c43..89fb9fb272 100644
--- a/examples/flutter_gallery/lib/demo/material/backdrop_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/backdrop_demo.dart
@@ -140,7 +140,7 @@ class CategoryView extends StatelessWidget {
             ],
           );
         }).toList(),
-      )
+      ),
     );
   }
 }
diff --git a/examples/flutter_gallery/lib/demo/material/banner_demo.dart b/examples/flutter_gallery/lib/demo/material/banner_demo.dart
index 68af50df32..d555a092b6 100644
--- a/examples/flutter_gallery/lib/demo/material/banner_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/banner_demo.dart
@@ -57,7 +57,7 @@ class _BannerDemoState extends State<BannerDemo> {
             setState(() {
               _displayBanner = false;
             });
-          }
+          },
         ),
         if (_showMultipleActions)
           FlatButton(
@@ -66,7 +66,7 @@ class _BannerDemoState extends State<BannerDemo> {
               setState(() {
                 _displayBanner = false;
               });
-            }
+            },
           ),
       ],
     );
diff --git a/examples/flutter_gallery/lib/demo/material/snack_bar_demo.dart b/examples/flutter_gallery/lib/demo/material/snack_bar_demo.dart
index 011203d6f1..891d8d757c 100644
--- a/examples/flutter_gallery/lib/demo/material/snack_bar_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/snack_bar_demo.dart
@@ -88,7 +88,7 @@ class _SnackBarDemoState extends State<SnackBarDemo> {
         tooltip: 'Create',
         onPressed: () {
           print('Floating Action Button was pressed');
-        }
+        },
       ),
     );
   }
diff --git a/examples/layers/raw/canvas.dart b/examples/layers/raw/canvas.dart
index 33f587ae1c..701d5519ce 100644
--- a/examples/layers/raw/canvas.dart
+++ b/examples/layers/raw/canvas.dart
@@ -46,7 +46,7 @@ ui.Picture paint(ui.Rect paintBounds) {
   // Clips the current transform
   canvas.clipRect(
     ui.Rect.fromLTRB(0, radius + 50, logicalSize.width, logicalSize.height),
-    clipOp: ui.ClipOp.difference
+    clipOp: ui.ClipOp.difference,
   );
 
   // Shifts the coordinate space of and rotates the current transform