Minor fix for LiveTest's documentation.

lib/src/backend/live_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.
 
 import 'dart:async';
 
 import 'group.dart';
 import 'state.dart';
 import 'suite.dart';
 import 'test.dart';
 
 /// A runnable instance of a test.
 ///
-/// This is distinct from [Test] in order to keep [Test]. Running a test
-/// requires state, and [LiveTest] provides a view of the state of the test as
-/// it runs.
+/// This is distinct from [Test] in order to keep [Test] immutable. Running a
+/// test requires state, and [LiveTest] provides a view of the state of the test
+/// as it runs.
 ///
 /// If the state changes, [state] will be updated before [onStateChange] fires.
 /// Likewise, if an error is caught, it will be added to [errors] before being
 /// emitted via [onError]. If an error causes a state change, [onStateChange]
 /// will fire before [onError]. If an error or other state change causes the
 /// test to complete, [onComplete] will complete after [onStateChange] and
 /// [onError] fire.
 abstract class LiveTest {
   /// The suite within which this test is being run.
   Suite get suite;
@@ skipping 111 matching lines @@
   ///
   /// This doesn't automatically happen after the test completes because there
   /// may be more asynchronous work going on in the background that could
   /// produce new errors.
   ///
   /// Returns a [Future] that completes once all resources are released *and*
   /// the test has completed. This allows the caller to wait until the test's
   /// tear-down logic has run.
   Future close();
 }