% FFC-specific part of chapter contributing.tex%------------------------------------------------------------------------------\section{License agreement}\index{license}By contributing a patch to \package{}, you agree to license yourcontributed code under the GNU General Public License (a conditionalso built into the GPL license of the code you have modified). Beforecreating the patch, please update the author and date information ofthe file(s) you have modified according to the following example:\begin{code}__author__ = "Anders Logg (logg@simula.no)"__date__ = "2004-11-17 -- 2005-09-09"__copyright__ = "Copyright (C) 2004, 2005 Anders Logg"__license__  = "GNU GPL Version 3 or any later version"# Modified by Foo Bar 2007\end{code}As a rule of thumb, the original author of a file holds the copyright.