code: def test_q_escaped_bytes_preserved(self):
      self._test(
          b"=?us-ascii?q?=20\xACfoo?=".decode(
              "us-ascii", "surrogateescape"
          ),
          " \uDCACfoo",
          defects=[errors.UndecodableBytesDefect],
      )
  
imports: import unittest
  from email import _encoded_words
  from email import errors
  from test.test_email import TestEmailBase
label_desc: Use image node_id 8 for calling the TestDecode obj's underlying member method code with example usage: obj.test_q_escaped_bytes_preserved() without return types