update copyright header + encoding

notebook/config_manager.py

@@ -1,7 +1,9 @@
-"""Manager to read and modify config data in JSON files.
-"""
-# Copyright (c) IPython Development Team.
+# coding: utf-8
+"""Manager to read and modify config data in JSON files."""
+
+# Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
+
 import errno
 import glob
 import io