Move py3.5 specific tests to their own file and adjust test environment

tests/test_autodoc.py

@@ -636,10 +636,6 @@ def test_generate():
                    ('attribute', 'test_autodoc.Class.inst_attr_string'),
                    ('method', 'test_autodoc.Class.moore'),
                    ])
-    if six.PY3 and sys.version_info[:2] >= (3, 5):
-        should.extend([
-            ('method', 'test_autodoc.Class.do_coroutine'),
-        ])
     options.members = ALL
     assert_processes(should, 'class', 'Class')
     options.undoc_members = True
@@ -838,11 +834,6 @@ class Base(object):
     def inheritedmeth(self):
         """Inherited function."""
 
-if six.PY3 and sys.version_info[:2] >= (3, 5):
-
-    async def _other_coro_func():
-        return "run"
-
 
 class Class(Base):
     """Class to document."""
@@ -900,13 +891,6 @@ class Class(Base):
         # undocumented special method
         pass
 
-    if six.PY3 and sys.version_info[:2] >= (3, 5):
-
-        async def do_coroutine(self):
-            """A documented coroutine function"""
-
-            attr_coro_result = await _other_coro_func()
-
 
 class CustomDict(dict):
     """Docstring."""