Is there a "GNU Diff General Public License"?

[Guenther, Erich]

we have found a reference to a license called "gnu diff general public license" 
in the files:
 \diffutils-2.8.1\src\ifdef.c
  \diffutils-2.8.1\src\side.c

quote:
<<<<<<<<<<<<<<<<<<<<<<<
gnu diff is distributed in the hope that it will be useful, but without any 
warranty. no author or distributor accepts responsibility to anyone for the 
consequences of using it or for whether it serves any particular purpose or 
works at all, unless he says so in writing. refer to the gnu diff general 
public license for full details. everyone is granted permission to copy, modify 
and redistribute gnu diff, but only under the conditions described in the gnu 
diff general public license. a copy of this license is supposed to have been 
given to you along with gnu diff so you can know your rights and 
responsibilities. it should be in a file named copying. among other things, the 
copyright notice and this notice must be preserved on all copies.
>>>>>>>>>>>>>>>>>>>>>

 We suppose that this is just a misspelling of the " GNU General Public 
 License", since we have not found a GNU diff General Public License 
 anywhere.....
 
 Do you agree to that?

mit freundlichen Grüssen
Erich Günther

Siemens AG
Automation and Drives 
Advanced technologies and Standards

Mail: <address@hidden>

Siemens Aktiengesellschaft: Chairman of the Supervisory Board: Gerhard Cromme;
Managing Board: Peter Löscher, Chairman, President and Chief Executive Officer;
Johannes Feldmayer, Heinrich Hiesinger, Joe Kaeser, Rudi Lamprecht, Eduardo 
Montes, 
Juergen Radomski, Erich R. Reinhardt, Hermann Requardt, Uriel J. Sharef, Klaus 
Wucherer;
Registered offices: Berlin and Munich;
Commercial registries: Berlin Charlottenburg, HRB 12300, Munich, HRB 6684
WEEE-Reg.-No. DE 23691322