[3.10] gh-136063: fix quadratic-complexity parsing in `email.message._parseparam` (GH-136072)#140831

miss-islington wants to merge 1 commit intopython:3.10python/cpython:3.10from

miss-islington:backport-680a5d0-3.10miss-islington/cpython:backport-680a5d0-3.10Copy head branch name to clipboard