ptx: match GNU default behavior by skipping non-alphabetic index tokens#10919

cakebaker merged 4 commits intouutils:mainuutils/coreutils:mainfrom

Xylphy:fix/ptx-gnu-compat-skip-nonalpha-defaultXylphy/coreutils:fix/ptx-gnu-compat-skip-nonalpha-defaultCopy head branch name to clipboard