doc(utl): Add missing doc.

schedula/utils/base.py

@@ -337,6 +337,10 @@ def plot(self, workflow=None, view=True, depth=-1, name=NONE, comment=NONE,
             Pool executor to render object.
         :type executor: str, optional
 
+        :param run:
+            Run the backend server?
+        :type run: bool, optional
+
         :return:
             A SiteMap or a Site if .
         :rtype: schedula.utils.drw.SiteMap

schedula/utils/utl.py

@@ -1,3 +1,16 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+#
+# Copyright 2015-2023, Vincenzo Arcidiacono;
+# Licensed under the EUPL (the 'Licence');
+# You may not use this work except in compliance with the Licence.
+# You may obtain a copy of the Licence at: http://ec.europa.eu/idabc/eupl
+
+"""
+It provides some utility functions.
+"""
+
+
 def dict_diff(adict: dict, excluded: set) -> dict:
     if excluded:
         return {k: v for k, v in adict.items() if k not in excluded}