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@c This is part of the Emacs manual.
-@c Copyright (C) 1985-1987, 1993-1995, 1997, 2001-2019 Free Software
+@c Copyright (C) 1985--1987, 1993--1995, 1997, 2001--2020 Free Software
@c Foundation, Inc.
@c See file emacs.texi for copying conditions.
@iftex