# Assumes a tab delimited flat file and the first field being a numeric key
BEGIN {
	FS = OFS = "\t";
	p = "";
}
# Strategy is to readline, check for key in first field, store to print
# on next readline if the next record has a key in first field, otherwise
# append our fragmented line to the stored line
{
	sub(/\r/,"");  # also scrub those pesky carriage returns
	if( $1 ~ /^[0-9]+$/ ) {
		if( p != "" ) {
			sub(/^\s+/,"",p);
			print p;
			p = "";
		}
		p = $0
	} else {
		p = p " " $0;
	}
}
END {
  print p
}