Make the URL for the data JSON file absolute. (#902)

* Make the URL for the data JSON file absolute.

* dart format

form_app/test/form_app_test.dart

@@ -12,13 +12,13 @@ final http.Client httpClient = MockClient();
 
 void main() {
   testWidgets('sign in', (tester) async {
-    await _signIn(tester, 'root','password');
+    await _signIn(tester, 'root', 'password');
     expect(find.text('Unable to sign in.'), findsNothing);
     expect(find.text('Successfully signed in.'), findsOneWidget);
   });
 
   testWidgets('sign in with bad password', (tester) async {
-    await _signIn(tester, 'admin','pw');
+    await _signIn(tester, 'admin', 'pw');
     expect(find.byType(AlertDialog), findsOneWidget);
     expect(find.text('Unable to sign in.'), findsOneWidget);
     expect(find.text('Successfully signed in.'), findsNothing);

web/filipino_cuisine/lib/main.dart

@@ -42,7 +42,8 @@ class HState extends State<Home> {
   }
 
   Future<void> getData() async {
-    http.Response r = await http.get('/data.json');
+    http.Response r = await http.get(
+        'https://flutter.github.io/samples/web/filipino_cuisine/data.json');
     fd = json.decode(r.body) as Map<String, dynamic>;
     setState(() => fi = fd['0'] as Map<String, dynamic>);
   }