Fix linting error

Author: warsaw

peps/pep-0829.rst

@@ -508,8 +508,9 @@ Python instead of TOML
 
 Required ``schema_version``
     Requiring ``schema_version`` would make the simplest valid file
-    more verbose without significant benefit.  The recommended-but-
-    optional approach balances simplicity with future-proofing.
+    more verbose without significant benefit.  The
+    recommended-but-optional
+    approach balances simplicity with future-proofing.
 
 Separate ``load`` and ``execute`` keys in ``[entrypoints]``
     Splitting import-only and callable entry points into separate lists