fix(763): satisfy ruff — E741 and formatting on the touched test file

CI's `Script lint and tests` job went red. Cause: I never ran ruff locally,
which this repo's Python convention requires after any .py change.

  - E741 twice: `l` as a comprehension variable in the sort-order guard.
  - `ruff format --check`: the file was correctly formatted on `main`; my edits
    broke it. One of them left a docstring line at column 0, which `ruff format`
    then "corrected" by over-indenting the rest of the paragraph — repaired at
    the source rather than accepting that rewrite.

Verified the way CI does: local ruff is the pinned 0.12.11, and both
`ruff check` and `ruff format --check` run under bash over the full tracked
population (`git ls-files -z '*.py' '*.pyi' '*.ipynb'`, 46 files) are clean.
The population is counted, not assumed — an empty glob would pass vacuously,
which is the failure `scripts/tests` guards against elsewhere.

`scripts/tests` 1097 passed, 2 skipped after the reformat.

refs #763

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/tests/test_pr_changed_files.py

@@ -3784,7 +3784,7 @@ def test_a_status_history_RUNNING_PAST_PAGE_1_is_PAGED_and_the_exemption_STANDS(
 def test_a_raced_verdict_on_PAGE_2_is_detected_and_repaired(tmp_path):
     """The hole #763 exists to close, and the half a paging change can still get wrong.
 
-A verdict sits BEYOND the first page — 60 ordinary rows with it inserted at index 55 — so only a
+    A verdict sits BEYOND the first page — 60 ordinary rows with it inserted at index 55 — so only a
     walk that continues past page 1 can find it. Under the pre-#763 code the exemption would still
     have been repaired here, but for the wrong reason (rows merely EXISTED on page 2), which is why
     this test is paired with the one above rather than standing alone: together they separate
@@ -4016,13 +4016,12 @@ def test_the_walk_does_not_request_a_SORT_order(tmp_path):
     # The REQUEST LINES ONLY — comments are excluded deliberately, because the withdrawal note inside
     # `page_statuses` names the parameter in order to explain why it is not used. A guard that reads
     # prose would fire on its own documentation.
-    requests = [l for l in src.splitlines()
-                if "statuses/$SHA?" in l and not l.lstrip().startswith("#")]
+    requests = [line for line in src.splitlines() if "statuses/$SHA?" in line and not line.lstrip().startswith("#")]
     assert requests, (
         "no `/statuses/{sha}` request line found; the walk has been reshaped, so re-point this guard "
         "rather than letting the sort-order assertion below pass vacuously"
     )
-    offenders = [l.strip() for l in requests if "sort=" in l]
+    offenders = [line.strip() for line in requests if "sort=" in line]
     assert not offenders, (
         "the status-history request carries a sort order again. ASC ordering puts the OLDEST rows on "
         "page 1, which inverts the partial-mark fallback into a spurious sticky repair — the #761 "
@@ -4112,11 +4111,8 @@ def test_a_MALFORMED_creator_row_does_not_kill_the_job_after_the_green_is_posted
     The fix type-tests `creator` before indexing it, so the malformed row is dropped from the count
     while the real verdict beside it is still counted and still repaired.
     """
-    posted, r = _run_classify(tmp_path, _emitting("docs/a.md"),
-                              history_mode="malformed-creator-beside-verdict")
-    assert r.returncode == 0, (
-        f"the step died instead of skipping a malformed row: {r.stderr[-1200:]}"
-    )
+    posted, r = _run_classify(tmp_path, _emitting("docs/a.md"), history_mode="malformed-creator-beside-verdict")
+    assert r.returncode == 0, f"the step died instead of skipping a malformed row: {r.stderr[-1200:]}"
     seq = _posted_sequence(tmp_path)
     assert len(seq) == 2, (
         "a malformed `creator` row suppressed the repair, leaving the exemption green over the real "
@@ -4137,7 +4133,7 @@ def test_a_MALFORMED_creator_row_does_not_kill_the_job_after_the_green_is_posted
 
 
 def test_a_verdict_BEYOND_A_SHORT_PAGE_is_still_found(tmp_path):
-    """"Terminate only on a validated EMPTY page, never on a short one" — the rule that is invisible
+    """ "Terminate only on a validated EMPTY page, never on a short one" — the rule that is invisible
     against a faithful double.
 
     On the real endpoint a short page IS the last page (measured: 50, 50, 14, `[]`), so an