Pyvows better error reporting

gistfile1.txt

        ✗ Should equal regular http get
            Expected body of /home/heynemann/dev/thumbor/vows/fixtures/conselheira_tutelar.jpg to match topic, but it didn't

            Traceback (most recent call last):
              File "/home/heynemann/.virtualenvs/home/lib/python2.6/site-packages/pyvows/runner.py", line 113, in async_run_vow
    result = member(context_instance, topic)
              File "/home/heynemann/dev/thumbor/vows/http_loader_vows.py", line 76, in should_equal_regular_http_get
    expect(topic).to_match_contents_of(fixture_for('conselheira_tutelar.jpg'))
              File "/home/heynemann/.virtualenvs/home/lib/python2.6/site-packages/pyvows/core.py", line 50, in assert_topic
    return getattr(Vows.Assert, method_name)(self.topic, *args, **kw)
              File "/home/heynemann/.virtualenvs/home/lib/python2.6/site-packages/pyvows/core.py", line 106, in exec_assertion
    return method_name(*args, **kw)
              File "/home/heynemann/.virtualenvs/home/lib/python2.6/site-packages/pyvows/core.py", line 104, in method_name
    method(*args, **kw)
              File "/home/heynemann/dev/thumbor/vows/http_loader_vows.py", line 23, in to_match_contents_of
    assert file(filepath).read() == topic, "Expected body of %s to match topic, but it didn't" % filepath
            AssertionError: Expected body of /home/heynemann/dev/thumbor/vows/fixtures/conselheira_tutelar.jpg to match topic, but it didn't


              Original Exception

              Traceback (most recent call last):
                File "/home/heynemann/.virtualenvs/home/lib/python2.6/site-packages/pyvows/runner.py", line 62, in async_run_context
    topic = topic_func(*topic_list)
                File "/home/heynemann/dev/thumbor/vows/http_loader_vows.py", line 70, in topic
    result = self._wait()
                File "/home/heynemann/.virtualenvs/home/lib/python2.6/site-packages/tornado_pyvows/context.py", line 76, in timeout_func
    timeout)
              AssertionError: Async operation timed out after 5 seconds


            (found in /home/heynemann/dev/thumbor/vows/http_loader_vows.py at line 74)