#length of longest line
$ awk '{ if (length($0) > max) max = length($0) }; END { print max }'  wine.txt   #pedestrian
$ awk 'length($0)>max{max=length($0)};END{print max}' wine.txt	#interesting
$ awk 'length>max{max=length};END{print max}' wine.txt 	#beat this!