Don't print clock updates between prints.

test/runner/compact_reporter_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 @TestOn("vm")
 
 import 'package:scheduled_test/descriptor.dart' as d;
 import 'package:scheduled_test/scheduled_stream.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 
@@ skipping 268 matching lines @@
              () => print('hello'));""",
           """
           +0: loading test.dart
           +0: really ... longer than that. No, yet longer. A little more... okay, that should do it.
           +0: really gosh dang long test name. Even longer than that. No, yet longer. A little more... okay, that should do it.
           hello
 
           +1: really ... longer than that. No, yet longer. A little more... okay, that should do it.
           +1: All tests passed!""");
     });
+
+    test("doesn't print a clock update between two prints", () {
+      _expectReport("""
+          test('slow', () async {
+            print('hello');
+            await new Future.delayed(new Duration(seconds: 3));
+            print('goodbye');
+          });""",
+          """
+          +0: loading test.dart
+          +0: slow
+          hello
+          goodbye
+
+          +1: slow
+          +1: All tests passed!""");
+    });
   });
 
   group("skip:", () {
     test("displays skipped tests separately", () {
       _expectReport("""
           test('skip 1', () {}, skip: true);
           test('skip 2', () {}, skip: true);
           test('skip 3', () {}, skip: true);""",
           """
           +0: loading test.dart
@@ skipping 115 matching lines @@
     // Un-indent the expected string.
     var indentation = expected.indexOf(new RegExp("[^ ]"));
     expected = expected.split("\n").map((line) {
       if (line.isEmpty) return line;
       return line.substring(indentation);
     }).join("\n");
 
     expect(actual, equals(expected));
   });
 }