ref: 32b9b4b6894b363f4e8b9c25f6df8292eb5f8d87 dir: /sys/src/cmd/python/Doc/tools/fix_libaux.sed/
#! /bin/sed -f s/{\\tt \\hackscore {}\\hackscore {}/\\sectcode{__/ s/\\hackscore {}\\hackscore {}/__/