Fix the weird names that can occur in exceptions and logs when there is no

tests/lib/unittest/unittest_test.dart

 // Copyright (c) 2012, 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.
 
 // TODO(gram):
 // Unfortunately I can't seem to test anything that involves timeouts, e.g.
 // insufficient callbacks, because the timeout is controlled externally
 // (test.dart?), and we would need to use a shorter timeout for the inner tests
 // so the outer timeout doesn't fire. So I removed all such tests.
 // I'd like to revisit this at some point.
@@ skipping 318 matching lines @@
     buildStatusString(1, 0, 0, 'a ${tests[6]}', 0,
         'setup', 'teardown'),
     buildStatusString(1, 0, 0, tests[7], 1),
     buildStatusString(0, 0, 1, tests[8], 1,
         message: 'Callback called more times than expected (2 > 1).'),
     buildStatusString(1, 0, 0, tests[9], 10),
     buildStatusString(1, 0, 0, tests[10]),
     buildStatusString(1, 0, 0, tests[11]),
     buildStatusString(1, 0, 0, tests[12]),
     buildStatusString(0, 1, 0, tests[13],
-        message: "Expected <null>.'foo'() to be called 1 times but:"
+        message: "Expected foo() to be called 1 times but:"
             " was called 2 times."),
     buildStatusString(0, 1, 0, tests[14],
         message: 'Caught Exception: No more actions for method foo.'),
     buildStatusString(0, 1, 0, tests[15], message:
-        "Expected <null>.'sum'() to sometimes return <0> but: never did."),
+        "Expected sum() to sometimes return <0> but: never did."),
     buildStatusString(0, 1, 0, tests[16],
         message: 'Caught Exception: No behavior specified for method bar.'),
     buildStatusString(1, 0, 0, tests[17]),
     buildStatusString(1, 0, 0, tests[18]),
     buildStatusString(1, 0, 0, tests[19]),
     buildStatusString(0, 1, 0, tests[20],
         message:'Caught Method names must start with lower case.'),
     buildStatusString(0, 1, 0, tests[21], message:
       "Caught Exception: Can't retrieve logs when logging was never enabled."),
   ];
 
   actual = [];
 
   nextTest(0);
 }