# @(#)merge.awk 8.3 (Berkeley) 5/26/94
#
# merge index entries into one line per label
$1 == prev {
printf ", %s", $2;
next;
}
{
if (NR != 1)
printf "\n";
printf "%s \t%s", $1, $2;
prev = $1;
END {
printf "\n"