troff.sed

早期freebsd实现

/^['.]/s//\\\&&/
/^%%/s//.&/
/--/s//\\*-/g
/_a-squared cos 2(phi)/s//\\fIa\\fP\\u2\\d cos 2\\(*f/
/__**\([a-zA-Z]*\)/s//\\fI\1\\fP/g
/"\(.\)/s//\1\\*:/g
/`\(.\)/s//\1\\*`/g
/'\(.\)/s//\1\\*'/g
/~\(.\)/s//\1\\*~/g
/\^\(.\)/s//\1\\*^/g
/,\(.\)/s//\1\\*,/g
/\(.\)\(.\)/s//\\o_\1\2_/g
/*/s//\\(bs/g