old_contents: from wtforms import TextField, BooleanField, Form
  from wtforms.validators import Required
  
  class SearchPackageForm(Form):
      package = TextField('package', validators = [Required()])
      maintainer = TextField('maintainer', validators = [Required()])
  
new_contents: # Copyright (c) 2013 Sylvestre Ledru <sylvestre@debian.org>
  #
  # Permission is hereby granted, free of charge, to any person obtaining a
  # copy of this software and associated documentation files (the "Software"),
  # to deal in the Software without restriction, including without limitation
  # the rights to use, copy, modify, merge, publish, distribute, sublicense,
  # and/or sell copies of the Software, and to permit persons to whom the
  # Software is furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  # DEALINGS IN THE SOFTWARE.
  
  from wtforms import TextField, Form
  from wtforms.validators import Required
  
  
  class SearchPackageForm(Form):
      package = TextField('package', validators = [Required()])
      maintainer = TextField('maintainer', validators = [Required()])
  
subject: Add license + remove useless declaration