#!/bin/sed -f

  :m
  s/<!--//g
  s/-->//g
  s/[^]*//g
  //!b c
  N
  b m
  :c
  /<[^>]*$/!b j
  N
  s/\n/ /g
  b c
  :j
  s/^  *//
  s/  *$//
  /^$/d
  s/><//g
  :n
  s/\([^ ]\)<\([^>]*\)>\([^ ]\)/\1\\c\2\3/
  t n
  s/ *<\([^>]*\)> */\1/g
  s/\./\\\&./g
  s///g
  s//./g
  s/^//
  s/$//
  s/*//g
  s//\
/g
  s/&ldquo;/\\[lq]/g
  s/&rdquo;/\\[rq]/g
  s/&rsquo;/'/g
  s/&nbsp;/\\~/g
  s/&minus;/\\-/g
  s/&rarr;/\\[->]/g
  s/&ndash;/\\[en]/g
  s/&mdash;/\\[em]/g