More prefer_const

It seems like flutter analyze might have some kind of cache

lib/screens/githostsetup_screens.dart

@@ -304,7 +304,7 @@ class GitHostSetupScreenState extends State<GitHostSetupScreen> {
       onWillPop: () async {
         if (_currentPageIndex != 0) {
           pageController.previousPage(
-            duration: Duration(milliseconds: 200),
+            duration: const Duration(milliseconds: 200),
             curve: Curves.easeIn,
           );
           return false;
@@ -318,7 +318,7 @@ class GitHostSetupScreenState extends State<GitHostSetupScreen> {
 
   void _nextPage() {
     pageController.nextPage(
-      duration: Duration(milliseconds: 200),
+      duration: const Duration(milliseconds: 200),
       curve: Curves.easeIn,
     );
   }

lib/screens/onboarding_screens.dart

@@ -101,7 +101,7 @@ class OnBoardingScreenState extends State<OnBoardingScreen> {
         padding: const EdgeInsets.all(16.0),
       ),
       bottomNavigationBar: AnimatedSwitcher(
-        duration: Duration(milliseconds: 300),
+        duration: const Duration(milliseconds: 300),
         child: bottomBar,
       ),
     );
@@ -116,7 +116,7 @@ class OnBoardingScreenState extends State<OnBoardingScreen> {
 
   void _nextPage() {
     pageController.nextPage(
-      duration: Duration(milliseconds: 200),
+      duration: const Duration(milliseconds: 200),
       curve: Curves.easeIn,
     );
   }

lib/utils.dart

@@ -52,7 +52,7 @@ void showUndoDeleteSnackbar(
 
   Flushbar(
     message: "Note Deleted",
-    duration: Duration(seconds: 3),
+    duration: const Duration(seconds: 3),
     mainButton: FlatButton(
       child: Text(
         "Undo",
@@ -69,6 +69,6 @@ void showUndoDeleteSnackbar(
 void showSnackbar(BuildContext context, String message) {
   Flushbar(
     message: message,
-    duration: Duration(seconds: 3),
+    duration: const Duration(seconds: 3),
   ).show(context);
 }

lib/widgets/note_header.dart

@@ -14,17 +14,17 @@ class NoteHeader extends StatelessWidget {
 
     var bigNum = Text(
       note.created.day.toString(),
-      style: TextStyle(fontSize: 40.0),
+      style: const TextStyle(fontSize: 40.0),
     );
 
     var dateText = Text(
       dateStr,
-      style: TextStyle(fontSize: 18.0),
+      style: const TextStyle(fontSize: 18.0),
     );
 
     var timeText = Text(
       timeStr,
-      style: TextStyle(fontSize: 18.0),
+      style: const TextStyle(fontSize: 18.0),
     );
 
     var w = Row(

test_driver/git_test.dart

@@ -28,7 +28,7 @@ void main() {
       await driver.tap(buttonFinder);
       await driver.waitFor(
         find.text("Success"),
-        timeout: Duration(seconds: 15),
+        timeout: const Duration(seconds: 15),
       );
     });
   });

test_driver/main_test.dart

@@ -33,7 +33,7 @@ void main() {
     test('Anonymous GitClone works', () async {
       // OnBoarding
       var nextButton = find.text("Next");
-      await driver.waitFor(nextButton, timeout: Duration(seconds: 5));
+      await driver.waitFor(nextButton, timeout: const Duration(seconds: 5));
       await _takeScreenshot();
       await driver.tap(nextButton);
 
@@ -47,15 +47,15 @@ void main() {
 
       // Main Screen
       final loadedFinder = find.text('Why not add your first\n Journal Entry?');
-      await driver.waitFor(loadedFinder, timeout: Duration(seconds: 5));
+      await driver.waitFor(loadedFinder, timeout: const Duration(seconds: 5));
       await _takeScreenshot();
 
       // Create a new note
       var fab = find.byValueKey("FAB");
-      await driver.waitFor(fab, timeout: Duration(seconds: 2));
+      await driver.waitFor(fab, timeout: const Duration(seconds: 2));
       await driver.tap(fab);
       await driver.waitFor(find.text('Write here'),
-          timeout: Duration(seconds: 2));
+          timeout: const Duration(seconds: 2));
       await _takeScreenshot();
 
       await driver.enterText(
@@ -64,28 +64,29 @@ void main() {
       await driver.tap(find.byValueKey("NewEntry"));
 
       // Create another note
-      await driver.waitFor(fab, timeout: Duration(seconds: 2));
+      await driver.waitFor(fab, timeout: const Duration(seconds: 2));
       await driver.tap(fab);
       await driver.waitFor(find.text('Write here'),
-          timeout: Duration(seconds: 2));
+          timeout: const Duration(seconds: 2));
 
       await driver.enterText(
           "Journaling is a great way to clear your mind and get all your throughts down into paper. Well, not literal paper, as this is an app, but I think you get the point.");
       await _takeScreenshot();
       await driver.tap(find.byValueKey("NewEntry"));
 
-      await Future.delayed(Duration(milliseconds: 500));
+      await Future.delayed(const Duration(milliseconds: 500));
       await _takeScreenshot();
 
       // Open the Drawer
       final drawerButtonFinder = find.byValueKey("DrawerButton");
       await driver.tap(drawerButtonFinder);
-      await Future.delayed(Duration(milliseconds: 500));
+      await Future.delayed(const Duration(milliseconds: 500));
       await _takeScreenshot();
 
       // The Git Host setup screen
       await driver.tap(find.text("Setup Git Host"));
-      await driver.waitFor(find.text("GitHub"), timeout: Duration(seconds: 2));
+      await driver.waitFor(find.text("GitHub"),
+          timeout: const Duration(seconds: 2));
       await _takeScreenshot();
       // FIXME: This doesn't seem to work!
       // await driver.tap(find.pageBack());