partialdef tag embedded in verbatim tag is treated as the source attribute for that named partial

[Jacob Walls]

Although partial and partialdef are correctly ignored when rendered if embedded within {% verbatim %}, the PartialTemplate.source attribute is fooled, potentially impacting error reporting:

tests/template_tests/syntax_tests/test_partials.py

@@ -484 +484 @@
         {
             "partial_with_syntax_error": (
                 "<h1>Title</h1>\n"
+                "{% verbatim %}\n"
+                "{% partialdef syntax_error_partial %}\n"
+                "VERBATIM\n"
+                "{% endpartialdef %}\n"
+                "{% endverbatim %}\n"
                 "{% partialdef syntax_error_partial %}\n"
                 "    {% if user %}\n"
                 "        <p>User: {{ user.name }}</p>\n"
@@ -506 +511 @@
             self.assertIn("endpartialdef", exc_debug["during"])
             self.assertEqual(exc_debug["name"], "partial_with_syntax_error")
             self.assertIn("endif", exc_debug["message"].lower())
+            self.assertNotIn("verbatim", exc_debug["source_lines"][0][1])
 
     @setup(
         {

======================================================================
FAIL: test_partial_with_syntax_error_exception_info (template_tests.syntax_tests.test_partials.PartialTagTests.test_partial_with_syntax_error_exception_info)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/jwalls/django/django/test/utils.py", line 458, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jwalls/django/tests/template_tests/utils.py", line 76, in inner
    func(self)
  File "/Users/jwalls/django/tests/template_tests/syntax_tests/test_partials.py", line 514, in test_partial_with_syntax_error_exception_info
    self.assertNotIn("verbatim", exc_debug["source_lines"][0][1])
AssertionError: 'verbatim' unexpectedly found in '{% verbatim %}\n'

---

The use case presented here isn't very serious, so I'm loathe to really mark this as a release blocker, but as it's a new feature and that's our process, and I'm not sure if there are other more important uses of the source attribute, I'll start there.