Suggest periods for complete sentences be inside parentheticals

Author: jsoref

Diff for: .github/actions/spelling/line_forbidden.patterns

@@ -16,6 +16,10 @@
 # https://twitter.com/nyttypos/status/1894816551435641027
 \brequires that \w+\b[^.]+to be\b
 
+# A fully parenthetical sentence’s period goes inside the parentheses, not outside.
+# https://twitter.com/nyttypos/status/1898844061873639490
+\([A-Z][a-z]{2,}(?: [a-z]+){3,}\)\.\s
+
 # Should be `HH:MM:SS`
 \bHH:SS:MM\b