[3.9] gh-135462: Fix quadratic complexity in processing special input in HTMLParser (GH-135464)#135486

ambv merged 1 commit into

python:3.9python/cpython:3.9from

serhiy-storchaka:backport-6eb6c5d-3.9serhiy-storchaka/cpython:backport-6eb6c5d-3.9Copy head branch name to clipboard