remove weird unicode space in the new copyright header

The bytes were actually:

    #\xe2\x80\x82Copyright...

COPYING.rst

@@ -70,5 +70,5 b' to indicate the copyright and license terms:'
 
 ::
 
-    # Copyright (c) IPython Development Team.
-    # Distributed under the terms of the Modified BSD License.
+    # Copyright (c) IPython Development Team.
+    # Distributed under the terms of the Modified BSD License.

IPython/html/static/notebook/js/quickhelp.js

@@ -1,5 +1,5 b''
-// Copyright (c) IPython Development Team.
-// Distributed under the terms of the Modified BSD License.
+// Copyright (c) IPython Development Team.
+// Distributed under the terms of the Modified BSD License.
 
 //============================================================================
 // QuickHelp button