Fix improper exception raises (2018.3)

salt/loader.py

@@ -1704,7 +1704,7 @@ def _load(self, key):
         if not isinstance(key, six.string_types):
             raise KeyError('The key must be a string.')
         if '.' not in key:
-            raise KeyError('The key \'%s\' should contain a \'.\'', key)
+            raise KeyError('The key \'{0}\' should contain a \'.\''.format(key))
         mod_name, _ = key.split('.', 1)
         with self._lock:
             # It is possible that the key is in the dictionary after

salt/log/handlers/sentry_mod.py

@@ -135,9 +135,7 @@ def setup_handlers():
             transport_registry = TransportRegistry(default_transports)
             url = urlparse(dsn)
             if not transport_registry.supported_scheme(url.scheme):
-                raise ValueError(
-                    'Unsupported Sentry DSN scheme: %s', url.scheme
-                )
+                raise ValueError('Unsupported Sentry DSN scheme: {0}'.format(url.scheme))
         except ValueError as exc:
             log.info(
                 'Raven failed to parse the configuration provided DSN: %s', exc

salt/modules/snapper.py

@@ -412,7 +412,7 @@ def create_snapshot(config='root', snapshot_type='single', pre_number=None,
                                                 cleanup_algorithm, userdata)
         else:
             raise CommandExecutionError(
-                "Invalid snapshot type '{0}'", format(snapshot_type))
+                "Invalid snapshot type '{0}'".format(snapshot_type))
     except dbus.DBusException as exc:
         raise CommandExecutionError(
             'Error encountered while listing changed files: {0}'

tests/unit/test_loader.py

@@ -305,17 +305,13 @@ def test_single_item_no_dot(self):
         '''
         Checks that a KeyError is raised when the function key does not contain a '.'
         '''
+        key = 'testing_no_dot'
+        expected = "The key '{0}' should contain a '.'".format(key)
         with self.assertRaises(KeyError) as err:
             inspect.isfunction(self.loader['testing_no_dot'])
 
-        if six.PY2:
-            self.assertEqual(err.exception[0],
-                             'The key \'%s\' should contain a \'.\'')
-        else:
-            self.assertEqual(
-                six.text_type(err.exception),
-                six.text_type(("The key '%s' should contain a '.'", 'testing_no_dot'))
-            )
+        result = err.exception.args[0]
+        assert result == expected, result
 
 
 module_template = '''