gh-161199: Speed up finding line endings in TextIOWrapper - #161200

gh-161199: Speed up finding line endings in TextIOWrapper#161200

ptweezy wants to merge 3 commits into

python:mainpython/cpython:mainfrom

ptweezy:gh-161199-textio-line-endingsptweezy/cpython:gh-161199-textio-line-endingsCopy head branch name to clipboard