old_contents: 
  # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    This program is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU General Public License as published by
  #    the Free Software Foundation, either version 3 of the License, or
  #    (at your option) any later version.
  #
  #    This program is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #    GNU General Public License for more details.
  #
  #    You should have received a copy of the GNU General Public License
  #    along with this program.  If not, see http://www.gnu.org/licenses/.
  #
  ##############################################################################
  
  from . import events_copy
  from . import events_date_modify
  from . import events_timetable_unify
  
new_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    This program is free software: you can redistribute it and/or modify
  #    it under the terms of the GNU General Public License as published by
  #    the Free Software Foundation, either version 3 of the License, or
  #    (at your option) any later version.
  #
  #    This program is distributed in the hope that it will be useful,
  #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #    GNU General Public License for more details.
  #
  #    You should have received a copy of the GNU General Public License
  #    along with this program.  If not, see http://www.gnu.org/licenses/.
  #
  ##############################################################################
  
  from . import events_copy
  from . import events_date_modify
  from . import events_timetable_unify
  
subject: Update __init__.py