diff --git a/setuptools/dist.py b/setuptools/dist.py
index 40440a406a..c074468ba9 100644
--- a/setuptools/dist.py
+++ b/setuptools/dist.py
@@ -622,7 +622,7 @@ def _parse_config_files(self, filenames=None):  # noqa: C901
                 setattr(self, alias or opt, val)
             except ValueError as e:
                 raise DistutilsOptionError(e) from e
-    
+
     def dash_to_underscore_warning(self, opt, section):
         if section in (
             'options.extras_require', 'options.data_files',