python 3 compatibility

remove __eq__ and __ne__ in Option

test/test_option_type.py

@@ -71,7 +71,7 @@ def test_group_is_hidden():
     prop = []
     try:
         config.gc.dummy = False
-    except PropertiesOptionError, err:
+    except PropertiesOptionError as err:
         prop = err.proptype
     assert 'hidden' in prop
 
@@ -89,7 +89,7 @@ def test_group_is_hidden_multi():
     prop = []
     try:
         objspace.append('std')
-    except PropertiesOptionError, err:
+    except PropertiesOptionError as err:
         prop = err.proptype
     assert 'hidden' in prop
     setting[obj].remove('hidden')