Applied tox -e style

Author: edel_gerardo

caldav/davclient.py

@@ -222,8 +222,8 @@ def _parse_response(self, response) -> Tuple[str, List[_Element], Optional[Any]]
                 assert not href
                 # Fix for https://github.com/python-caldav/caldav/issues/471
                 # Confluence server quotes the user email twice. We unquote it manually.
-                if '%2540' in elem.text:
-                    elem.text = elem.text.replace('%2540', '%40')
+                if "%2540" in elem.text:
+                    elem.text = elem.text.replace("%2540", "%40")
                 href = unquote(elem.text)
             elif elem.tag == dav.PropStat.tag:
                 propstats.append(elem)