Format all tests.

tests/lib_strong/html/streams_test.dart

 import 'dart:async';
 import 'dart:html';
 
 import 'package:expect/minitest.dart';
 
 class StreamHelper {
   var _a;
   StreamHelper() {
     _a = new TextInputElement();
     document.body.append(_a);
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     var helper = new StreamHelper();
     parent.append(helper.element);
 
     var childCallCount = 0;
     var parentCallCount = 0;
     Element.focusEvent.forTarget(parent, useCapture: true).listen((Event e) {
       ++parentCallCount;
       expect(childCallCount, 0);
     });
 
-    Element.focusEvent.forTarget(helper.element, useCapture: true).listen(
-        (Event e) {
-          ++childCallCount;
-          expect(parentCallCount, 1);
-        });
+    Element.focusEvent
+        .forTarget(helper.element, useCapture: true)
+        .listen((Event e) {
+      ++childCallCount;
+      expect(parentCallCount, 1);
+    });
 
     helper.pulse();
     expect(childCallCount, 1);
     expect(parentCallCount, 1);
   });
 
   test('cancel', () {
     var helper = new StreamHelper();
 
     var callCount = 0;
@@ skipping 192 matching lines @@
   });
 
   test('singleWhere', () {
     stream.singleWhere((_) => true).then((_) {});
   });
 
   test('elementAt', () {
     stream.elementAt(0).then((_) {});
   });
 }