Simplify tests under utils/tests to follow StandardTestSuite convention.

utils/tests/peg/peg_tests.dart

Index: utils/tests/peg/peg_tests.dart
diff --git a/utils/tests/peg/src/PegTest.dart b/utils/tests/peg/peg_tests.dart
similarity index 99%
rename from utils/tests/peg/src/PegTest.dart
rename to utils/tests/peg/peg_tests.dart
index 9d29662feb45a57557a5a03acac511f19833f8d6..48144b702fc4607fca61f23c8d091b48c684a9a0 100644
--- a/utils/tests/peg/src/PegTest.dart
+++ b/utils/tests/peg/peg_tests.dart
@@ -2,7 +2,7 @@
 // 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('../../../peg/pegparser.dart');
+#import('../../peg/pegparser.dart');
 
 testParens() {
   Grammar g = new Grammar();