fix(util): match the PR template's changelog box in issue_pr_kinds.body

tests/project/test_issue_pr_kinds_2561.py

@@ -249,6 +249,14 @@ def test_the_body_fills_in_the_template(self) -> None:
         self.assertNotIn('Explanation of your *pull request*', text)
         self.assertIn('[Searched]', text)
 
+    def test_the_body_marks_the_templates_changelog_box_not_applicable(self) -> None:
+        boxes = [line for line in issue_pr_kinds.TEMPLATE.read_text(encoding='utf-8').splitlines()
+                 if line.startswith('- [ ] ') and 'changelog' in line]
+        self.assertEqual(len(boxes), 1, boxes)
+        text = issue_pr_kinds.body(TEXT, 'https://run')
+        self.assertIn(f'{boxes[0]} — N/A — centralised in #657\n', text)
+        self.assertEqual(text.count('N/A — centralised in #657'), 1)
+
 
 if __name__ == '__main__':
     unittest.main()

util/issue_pr_kinds.py

@@ -120,7 +120,8 @@ def body(kinds_text: 'str', run_url: 'str') -> 'str':
     text = re.sub(r'(?m)^- \[ \] `test`', '- [x] `test`', text)
     text = re.sub(r'(?m)^(- \[ \] `make test` passes.*)$', r"\1 -- not run here; this pull request's checks run it",
                   text)
-    text = re.sub(r'(?m)^(- \[ \] Added a \[changelog entry\].*)$', r'\1 — N/A — centralised in #657', text)
+    # The changelog box, found by its link rather than by the wording around it.
+    text = re.sub(r'(?m)^(- \[ \] .*\[changelog entry\].*)$', r'\1 — N/A — centralised in #657', text)
     description = (f'Regenerated `{PATH}` from the tracker with `python util/issue_pr_kinds.py`, up to #{newest}, '
                    'so `tests/project/test_docs_issue_pr_roles_1103_unit.py` checks every role citing a number '
                    f'up to it. Opened by the Issue and PR Kinds workflow ({run_url}); a later run force-pushes '