code: def test_folding_with_utf8_encoding_6(self):
      # bpo-36520
      #
      # Fold a line that contains a UTF-8 word before
      # the fold point and ASCII words after
  
      m = EmailMessage()
      m["Subject"] = (
          "123456789 123456789 123456789 123456789 Hello Wörld!"
          " 123456789 123456789 123456789 123456789 123456789"
          " 123456789"
      )
      self.assertEqual(
          bytes(m),
          b"Subject: 123456789 123456789 123456789 123456789"
          b" Hello =?utf-8?q?W=C3=B6rld!?=\n 123456789 "
          b"123456789 123456789 123456789 123456789 "
          b"123456789\n\n",
      )
  
imports: import unittest
  import textwrap
  from email import policy, message_from_string
  from email.message import EmailMessage, MIMEPart
  from test.test_email import TestEmailBase, parameterize
label_desc: Use image node_id 13 for calling the TestEmailMessage obj's underlying member method code with example usage: obj.test_folding_with_utf8_encoding_6() without return types