ref: faee6c5f1da7a6fc03aa9da4dd9ff2f02e3f1d37 dir: /sys/src/cmd/python/Doc/tools/fix_libaux.sed/
#! /bin/sed -f s/{\\tt \\hackscore {}\\hackscore {}/\\sectcode{__/ s/\\hackscore {}\\hackscore {}/__/