usr.bin/fortune/tools/Troff.sed

   1 /^['.]/s//\\\&&/
   2 /^%%/s//.&/
   3 /--/s//\\*-/g
   4 /_\ba-squared cos 2(phi)/s//\\fIa\\fP\\u2\\d cos 2\\(*f/
   5 /__*\b\b*\([a-zA-Z]*\)/s//\\fI\1\\fP/g
   6 /"\b\(.\)/s//\1\\*:/g
   7 /`\b\(.\)/s//\1\\*`/g
   8 /'\b\(.\)/s//\1\\*'/g
   9 /~\b\(.\)/s//\1\\*~/g
  10 /\^\b\(.\)/s//\1\\*^/g
  11 /,\b\(.\)/s//\1\\*,/g
  12 /\(.\)\b\(.\)/s//\\o_\1\2_/g
  13 /\a\a*/s//\\(bs/g