old_contents: def get_body(grab, encoding='cp1251', bom=False, skip_errors=True, fix_spec_chars=True):
      return grab.doc.convert_body_to_unicode(grab.doc.body, bom, encoding, skip_errors, fix_spec_chars)
  
new_contents: # TODO: remove useless params
  def get_body(grab, encoding='cp1251', bom=False, skip_errors=True, fix_spec_chars=True):
      return grab.doc.body.decode('utf-8', 'ignore')
  
subject: Rework get body text method