fix lint error

Author: shenxianpeng

readme_renderer/markdown.py

@@ -34,10 +34,12 @@
     from cmarkgfm.cmark import Options as cmarkgfmOptions
     variants: Dict[str, Callable[[str], str]] = {
         "GFM": lambda raw: cast(str, cmarkgfm.github_flavored_markdown_to_html(
-            raw, options=cmarkgfmOptions.CMARK_OPT_UNSAFE | cmarkgfmOptions.CMARK_OPT_FOOTNOTES
+            raw, options=(
+                cmarkgfmOptions.CMARK_OPT_UNSAFE | cmarkgfmOptions.CMARK_OPT_FOOTNOTES)
         )),
         "CommonMark": lambda raw: cast(str, cmarkgfm.markdown_to_html(
-            raw, options=cmarkgfmOptions.CMARK_OPT_UNSAFE | cmarkgfmOptions.CMARK_OPT_FOOTNOTES
+            raw, options=(
+                cmarkgfmOptions.CMARK_OPT_UNSAFE | cmarkgfmOptions.CMARK_OPT_FOOTNOTES)
         )),
     }
 except ImportError:

tests/fixtures/test_GFM_footnotes.html

@@ -5,4 +5,4 @@
 <p>this is true <a href="#fnref-1" class="footnote-backref" data-footnote-backref data-footnote-backref-idx="1" aria-label="Back to reference 1">↩</a></p>
 </li>
 </ol>
-</section>
+</section>