4.3BSD-UWisc/lib/learn/editor/L43.2b

#print
Pick up the file "line" and change
 x, y. and z
into
 x, y, and z
Then rewrite the file and type "ready".
#create Ref
 x, y, and z
#create line
 x, y. and z
#user
#cmp line Ref
#log
#next
43.2c 5