Fix formatting of tests and change dash deprecation method name

setuptools/dist.py

@@ -600,7 +600,7 @@ def _parse_config_files(self, filenames=None):  # noqa: C901
                         continue
 
                     val = parser.get(section, opt)
-                    opt = self.dash_to_underscore_warning(opt, section)
+                    opt = self.warn_dash_deprecation(opt, section)
                     opt = self.make_option_lowercase(opt, section)
                     opt_dict[opt] = (filename, val)
 
@@ -626,7 +626,7 @@ def _parse_config_files(self, filenames=None):  # noqa: C901
             except ValueError as e:
                 raise DistutilsOptionError(e) from e
 
-    def dash_to_underscore_warning(self, opt, section):
+    def warn_dash_deprecation(self, opt, section):
         if section in (
             'options.extras_require', 'options.data_files',
         ):

setuptools/tests/test_config.py

@@ -507,10 +507,9 @@ def test_not_utf8(self, tmpdir):
             with get_dist(tmpdir):
                 pass
 
-    def test_dash_to_underscore_warning(self, tmpdir):
-        # dash_to_underscore_warning() is a method in setuptools.dist
-        # remove this test and method when dash convert to underscore in setup.cfg
-        # is no longer supported
+    def test_warn_dash_deprecation(self, tmpdir):
+        # warn_dash_deprecation() is a method in setuptools.dist
+        # remove this test and the method when no longer needed
         fake_env(
             tmpdir,
             '[metadata]\n'
@@ -523,11 +522,12 @@ def test_dash_to_underscore_warning(self, tmpdir):
         with pytest.warns(UserWarning, match=msg):
             with get_dist(tmpdir) as dist:
                 metadata = dist.metadata
-                assert metadata.author_email == '[email protected]'
-                assert metadata.maintainer_email == '[email protected]'
 
-    def test_uppercase_warning(self, tmpdir):
-        # remove this test and the method uppercase_warning() in setuptools.dist
+        assert metadata.author_email == '[email protected]'
+        assert metadata.maintainer_email == '[email protected]'
+
+    def test_make_option_lowercase(self, tmpdir):
+        # remove this test and the method make_option_lowercase() in setuptools.dist
         # when no longer needed
         fake_env(
             tmpdir,