pkg/dartdoc: moving files around, fix library names

pkg/docgen/lib/src/io.dart

Index: pkg/docgen/lib/src/io.dart
diff --git a/pkg/docgen/lib/src/io.dart b/pkg/docgen/lib/src/io.dart
index 9998687ca5ca7033812a02c732a2e3e12c1295c0..f02272a077ee707318e67c93ccb3ba9321880d8c 100644
--- a/pkg/docgen/lib/src/io.dart
+++ b/pkg/docgen/lib/src/io.dart
@@ -1,5 +1,10 @@
-library io;
+// Copyright (c) 2014, 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.
+
 /// This is a helper library to make working with io easier.
+library docgen.io;
+
 // TODO(janicejl): listDir, canonicalize, resolveLink, and linkExists are from
 // pub/lib/src/io.dart. If the io.dart file becomes a package, should remove
 // copy of the functions.
@@ -148,4 +153,4 @@ String resolveLink(String link) {
 
 /// Returns whether [link] exists on the file system. This will return `true`
 /// for any symlink, regardless of what it points at or whether it's broken.
-bool linkExists(String link) => new Link(link).existsSync();
+bool linkExists(String link) => new Link(link).existsSync();