Point users to
@@ -426,7 +426,8 @@ class HTMLLinkParser(HTMLParser):
raise ValueError(
"HTML doctype missing or incorrect. Expected <!DOCTYPE html>.\n\n"
"If you believe this error to be incorrect, try passing the "
- "command line option --use-deprecated=html5lib."
+ "command line option --use-deprecated=html5lib and please leave "
+ "a comment on the pip issue at https://github.com/pypa/pip/issues/10825."
)
