remove typo

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@13846 2fb0f335-1f38-0410-981e-8018bf24f1b0

dumux/io/dgfgridcreator.hh

-r// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *