s/comment --- transform a list of nodenames followed by a   ---/&/
s/comment --- chapter or a section name, into a Sed script  ---/&/
s/comment --- which adds chapter, section numbers to menus. ---/&/

/^@node[ 	]/ {
  N
  s/\n/!!=!!/
  /^@node  *Top[^a-z]/d
  s/^@node  *\([^,][^,]*\),.*!!=!!@\([a-z][a-z]*\)[ 	][ 	]*\([0-9]\(\.*[0-9]\)*\).*/s|\\(<A HREF="#\1"> \\)\1--|\\1\2 \3 \1--|/
  s/chapter \([0-9][0-9.]*\)/\1./
  s/section \([0-9][0-9.]*\)/\1/
}