Refs #7697 -- Removed unnecessary force_escape of technical 500 debug view "unicode hint".

The test passes before and after the removal. unicode_hint will never
be SafeText, so normal autoescaping is sufficient.

django/views/templates/technical_500.html

@@ -162,7 +162,7 @@
 {% if unicode_hint %}
 <div id="unicode-hint">
     <h2>Unicode error hint</h2>
-    <p>The string that could not be encoded/decoded was: <strong>{{ unicode_hint|force_escape }}</strong></p>
+    <p>The string that could not be encoded/decoded was: <strong>{{ unicode_hint }}</strong></p>
 </div>
 {% endif %}
 {% if template_does_not_exist %}

tests/view_tests/tests/test_debug.py

@@ -18,6 +18,7 @@ from django.test.utils import LoggingCaptureMixin, patch_logger
 from django.urls import reverse
 from django.utils.encoding import force_bytes
 from django.utils.functional import SimpleLazyObject
+from django.utils.safestring import mark_safe
 from django.views.debug import (
     CLEANSED_SUBSTITUTE, CallableSettingWrapper, ExceptionReporter,
     cleanse_setting, technical_500_response,
@@ -447,16 +448,19 @@ class ExceptionReporterTests(SimpleTestCase):
         self.assertIn('<trimmed %d bytes string>' % (large + repr_of_str_adds,), html)
 
     def test_encoding_error(self):
-        """A UnicodeError displays a portion of the problematic string."""
+        """
+        A UnicodeError displays a portion of the problematic string. HTML in
+        safe strings is escaped.
+        """
         try:
-            'abcdefghijklmnὀpqrstuwxyz'.encode('ascii')
+            mark_safe('abcdefghijkl<p>mnὀp</p>qrstuwxyz').encode('ascii')
         except Exception:
             exc_type, exc_value, tb = sys.exc_info()
         reporter = ExceptionReporter(None, exc_type, exc_value, tb)
         html = reporter.get_traceback_html()
         self.assertIn('<h2>Unicode error hint</h2>', html)
         self.assertIn('The string that could not be encoded/decoded was: ', html)
-        self.assertIn('<strong>jklmnὀpqrst</strong>', html)
+        self.assertIn('<strong>&lt;p&gt;mnὀp&lt;/p&gt;</strong>', html)
 
     def test_unfrozen_importlib(self):
         """