ref: 3e94fbcf9c6caa7cde6051bec82cae3b1c8d3e11 dir: /sys/src/cmd/python/Doc/tools/fix_libaux.sed/
#! /bin/sed -f s/{\\tt \\hackscore {}\\hackscore {}/\\sectcode{__/ s/\\hackscore {}\\hackscore {}/__/