Fix docutils deprecation warning when generating RSS (#2744)

generate_rss.py

@@ -7,8 +7,7 @@ import email.utils
 from pathlib import Path
 import re
 
-import docutils
-from docutils import frontend
+import docutils.frontend
 from docutils import nodes
 from docutils import utils
 from docutils.parsers import rst
@@ -25,14 +24,6 @@ def _format_rfc_2822(dt: datetime.datetime) -> str:
     return email.utils.format_datetime(dt, usegmt=True)
 
 
-# Monkeypatch nodes.Node.findall for forwards compatability
-if docutils.__version_info__ < (0, 18, 1):
-    def findall(self, *args, **kwargs):
-        return iter(self.traverse(*args, **kwargs))
-
-    nodes.Node.findall = findall
-
-
 entry.formatRFC2822 = feed.formatRFC2822 = _format_rfc_2822
 line_cache: dict[Path, dict[str, str]] = {}
 
@@ -131,7 +122,7 @@ def pep_creation(full_path: Path) -> datetime.datetime:
 
 def parse_rst(full_path: Path) -> nodes.document:
     text = full_path.read_text(encoding="utf-8")
-    settings = frontend.OptionParser((rst.Parser,)).get_default_values()
+    settings = docutils.frontend.get_default_settings(rst.Parser)
     document = utils.new_document(f'<{full_path}>', settings=settings)
     rst.Parser(rfc2822=True).parse(text, document)
     return document

requirements.txt

@@ -1,7 +1,7 @@
 # Requirements for building PEPs with Sphinx
 Pygments >= 2.9.0
 Sphinx >= 4.0.2
-docutils >= 0.17.1
+docutils >= 0.19.0
 
 # For RSS
 feedgen >= 0.9.0  # For RSS feed