Minor fixes based on an inspection of 2.0.0 release in pub and on dartdocs.org (#37)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a006da..7f7e4a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+#### 2.0.1
+
+* Minor doc updates
+
 #### 2.0.0
 
 * Improved `toString` implementations in file system entity classes
diff --git a/lib/chroot.dart b/lib/chroot.dart
index 3477bb1..ddac288 100644
--- a/lib/chroot.dart
+++ b/lib/chroot.dart
@@ -2,4 +2,5 @@
 // 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.
 
+/// A file system that provides a view into _another_ [FileSystem] via a path.
 export 'src/backends/chroot.dart';
diff --git a/lib/memory.dart b/lib/memory.dart
index 85dfcc6..31e90e7 100644
--- a/lib/memory.dart
+++ b/lib/memory.dart
@@ -2,11 +2,6 @@
 // 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 'src/backends/memory.dart';
-import 'src/interface.dart';
-
-/// An implementation of [FileSystem] that exists entirely in memory with an
+/// An implementation of `FileSystem` that exists entirely in memory with an
 /// internal representation loosely based on the Filesystem Hierarchy Standard.
-/// [MemoryFileSystem] is suitable for mocking and tests, as well as for
-/// caching or staging before writing or reading to a live system.
 export 'src/backends/memory.dart';
diff --git a/lib/record_replay.dart b/lib/record_replay.dart
index 189ae18..be28576 100644
--- a/lib/record_replay.dart
+++ b/lib/record_replay.dart
@@ -2,6 +2,8 @@
 // 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.
 
+/// File systems that work together to record invocations during live operation
+/// and then play invocations back in tests.
 export 'src/backends/record_replay/errors.dart';
 export 'src/backends/record_replay/events.dart'
     show InvocationEvent, PropertyGetEvent, PropertySetEvent, MethodEvent;
diff --git a/lib/testing.dart b/lib/testing.dart
index a56ef19..178711a 100644
--- a/lib/testing.dart
+++ b/lib/testing.dart
@@ -2,5 +2,6 @@
 // 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.
 
+/// Matchers (from `package:test`) for use in tests that deal with file systems.
 export 'src/testing/core_matchers.dart';
 export 'src/testing/record_replay_matchers.dart';
diff --git a/pubspec.yaml b/pubspec.yaml
index a58037f..5ff29a7 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: file
-version: 2.0.0
+version: 2.0.1
 authors:
 - Matan Lurey <matanl@google.com>
 - Yegor Jbanov <yjbanov@google.com>