old_contents: import io
  from email.mime.application import MIMEApplication
  from email.mime.text import MIMEText
  
  import xlsxwriter
  from django.utils import timezone
  from django.utils.translation import ugettext as _
  
  from apps.contrib.emails import Email
  
  
  class FormEmail(Email):
      template_name = 'meinberlin_cms/emails/form_submission'
  
      def get_receivers(self):
          return [x.strip() for x in self.object.to_address.split(',')]
  
  
  class XlsxFormEmail(FormEmail):
  
      def _generate_xlsx(self):
          stream = io.BytesIO()
          workbook = xlsxwriter.Workbook(stream, {'in_memory': True})
          worksheet = workbook.add_worksheet()
  
          worksheet.write(0, 0, _('Form Field'))
          worksheet.write(0, 1, _('Response'))
  
          rows = self.object.field_values.items()
          for rownum, row in enumerate(rows, start=1):
              worksheet.write(rownum, 0, row[0])
              worksheet.write(rownum, 1, row[1])
  
          workbook.close()
          return stream.getvalue()
  
      def get_attachments(self):
          attachments = super().get_attachments()
          xlsx_data = self._generate_xlsx()
          mime_doc = MIMEApplication(
              _data=xlsx_data,
              _subtype='vnd.openxmlformats-officedocument.spreadsheetml.sheet')
          timestamp = timezone.now().strftime("%Y-%m-%d")
          form_title = self.object.title.replace(' ', '_')
          submission_pk = self.object.get_submission_class().objects.last().pk
          filename = '{}_{}_{}.xlsx'.format(timestamp, form_title, submission_pk)
          mime_doc.add_header(
              'Content-Disposition',
              'attachment; filename="{}"'.format(filename)
          )
          return attachments + [mime_doc]
  
  
  class TextFormEmail(FormEmail):
  
      def get_attachments(self):
          attachments = super().get_attachments()
          text = ''
          for field, value in self.object.field_values.items():
              text += '{}:\n{}\n\n'.format(field, value)
          mime_doc = MIMEText(_text=text, _charset='utf-8')
          return attachments + [mime_doc]
  
new_contents: import io
  from email.mime.application import MIMEApplication
  from email.mime.text import MIMEText
  
  import xlsxwriter
  from django.utils import timezone
  from django.utils.translation import ugettext as _
  
  from apps.contrib.emails import Email
  
  
  class FormEmail(Email):
      template_name = 'meinberlin_cms/emails/form_submission'
  
      def get_receivers(self):
          return [x.strip() for x in self.object.to_address.split(',')]
  
  
  class XlsxFormEmail(FormEmail):
  
      def _generate_xlsx(self):
          stream = io.BytesIO()
          workbook = xlsxwriter.Workbook(stream, {'in_memory': True})
          worksheet = workbook.add_worksheet()
  
          worksheet.write(0, 0, _('Form Field'))
          worksheet.write(0, 1, _('Response'))
  
          rows = self.object.field_values.items()
          for rownum, row in enumerate(rows, start=1):
              field = row[0].replace('\r', '')
              worksheet.write(rownum, 0, field)
              value = row[1].replace('\r', '')
              worksheet.write(rownum, 1, value)
  
          workbook.close()
          return stream.getvalue()
  
      def get_attachments(self):
          attachments = super().get_attachments()
          xlsx_data = self._generate_xlsx()
          mime_doc = MIMEApplication(
              _data=xlsx_data,
              _subtype='vnd.openxmlformats-officedocument.spreadsheetml.sheet')
          timestamp = timezone.now().strftime("%Y-%m-%d")
          form_title = self.object.title.replace(' ', '_')
          submission_pk = self.object.get_submission_class().objects.last().pk
          filename = '{}_{}_{}.xlsx'.format(timestamp, form_title, submission_pk)
          mime_doc.add_header(
              'Content-Disposition',
              'attachment; filename="{}"'.format(filename)
          )
          return attachments + [mime_doc]
  
  
  class TextFormEmail(FormEmail):
  
      def get_attachments(self):
          attachments = super().get_attachments()
          text = ''
          for field, value in self.object.field_values.items():
              text += '{}:\n{}\n\n'.format(field, value)
          mime_doc = MIMEText(_text=text, _charset='utf-8')
          return attachments + [mime_doc]
  
subject: fix multiline output