fix flake8 F541

Author: Eugene Prilepin

click_option_group/_core.py

@@ -324,7 +324,7 @@ def handle_parse_result(self, option: GroupedOption, ctx: click.Context, opts: d
         given_option_count = len(given_option_names)
 
         if given_option_count > 1:
-            error_text = f'The given mutually exclusive options cannot be used at the same time:'
+            error_text = 'The given mutually exclusive options cannot be used at the same time:'
             error_text += f'\n{self.get_error_hint(ctx, given_option_names)}'
             raise click.UsageError(error_text, ctx=ctx)
 

tests/test_click_option_group.py

@@ -642,7 +642,7 @@ def cli(hello, foo1, bar1, goodbye):
     assert 'foo1,bar1' in result.output
 
     with pytest.raises(
-      TypeError, match=f"'hidden' attribute is not allowed for 'RequiredAllOptionGroup' option `bar'"):
+      TypeError, match="'hidden' attribute is not allowed for 'RequiredAllOptionGroup' option `bar'"):
         @click.command()
         @optgroup(cls=RequiredAllOptionGroup)
         @optgroup.option('--foo')