[pre-commit.ci lite] apply automatic fixes

Author: pre-commit-ci-lite[bot]

src/wtforms/validators.py

@@ -368,8 +368,7 @@ def _validate_mode(self, mode):
         if mode not in self._supported_modes:
             raise ValidatorSetupError(
                 "Invalid mode value '{}'. Supported values: {}".format(
-                    mode,
-                    ", ".join(self._supported_modes)
+                    mode, ", ".join(self._supported_modes)
                 )
             )
         return mode

tests/validators/test_regexp.py

@@ -244,8 +244,7 @@ def test_regex_invalid_mode(dummy_form, dummy_field, re_mode):
         regexp("^a", mode=re_mode)
 
     expected = (
-        "Invalid mode value '{}'. "
-        "Supported values: search, match, fullmatch"
-    ).format(re_mode)
+        f"Invalid mode value '{re_mode}'. " "Supported values: search, match, fullmatch"
+    )
 
     assert e.value.args[0] == expected