Fix test__execmodules to supply the right module name.

src/gevent/local.py

@@ -615,7 +615,8 @@ if local.__module__ == 'gevent.local':
 else: # pragma: no cover
     # Make sure we revisit in case of changes to the (accelerator) module names.
     if local.__module__ != 'gevent._gevent_clocal':
-        raise AssertionError("Module names changed; revisit this code.")
+        raise AssertionError("Module names changed (local: %r; __name__: %r); revisit this code" % (
+            local.__module__, __name__) )
 
 _init()
 

src/gevent/tests/test__execmodules.py

@@ -8,14 +8,13 @@ from gevent.testing import six
 
 
 def make_exec_test(path, module):
-
     def test(_):
         with open(path, 'rb') as f:
             src = f.read()
         with warnings.catch_warnings():
             warnings.simplefilter('ignore', DeprecationWarning)
             try:
-                six.exec_(src, {'__file__': path})
+                six.exec_(src, {'__file__': path, '__name__': module})
             except ImportError:
                 if module in modules.OPTIONAL_MODULES:
                     raise unittest.SkipTest("Unable to import optional module %s" % module)