Fix middle slash removed by replace

Author: Afnarel

rest_framework_docs/api_endpoint.py

@@ -11,7 +11,7 @@ def __init__(self, pattern, parent_pattern=None):
         self.callback = pattern.callback
         # self.name = pattern.name
         self.docstring = self.__get_docstring__()
-        self.name_parent = simplify_regex(parent_pattern.regex.pattern).replace('/', '') if parent_pattern else None
+        self.name_parent = simplify_regex(parent_pattern.regex.pattern).strip('/') if parent_pattern else None
         self.path = self.__get_path__(parent_pattern)
         self.allowed_methods = self.__get_allowed_methods__()
         # self.view_name = pattern.callback.__name__