gh-139489: Add xml.sax.saxutils.is_valid_name()#139768

serhiy-storchaka wants to merge 2 commits intopython:mainpython/cpython:mainfrom

serhiy-storchaka:xml-sax-utils-is_valid_nameserhiy-storchaka/cpython:xml-sax-utils-is_valid_nameCopy head branch name to clipboard