pkg/dartdoc: moving files around, fix library names

pkg/docgen/test/multi_library_code/lib/test_lib_bar.dart

Index: pkg/docgen/test/multi_library_code/lib/test_lib_bar.dart
diff --git a/pkg/docgen/test/multi_library_code/lib/test_lib_bar.dart b/pkg/docgen/test/multi_library_code/lib/test_lib_bar.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c329a434ab1bb2ca6c280923c6b65d3b4fa0563e
--- /dev/null
+++ b/pkg/docgen/test/multi_library_code/lib/test_lib_bar.dart
@@ -0,0 +1,19 @@
+library test_lib.bar;
+
+import 'test_lib.dart';
+
+/*
+ * Normal comment for class C.
+ */
+class C {
+}
+
+/// [input] is of type [C] returns an [A].
+A generateFoo(C input) {
+  throw 'noop';
+}
+
+/// Processes a [C] instance for testing.
+///
+/// To eliminate import warnings for [A] and to test typedefs.
+typedef A AnATransformer(C other);