4.3BSD-UWisc/lib/learn/editor/L64.1b

#print
Another exercise in the effective use of the 't'
command:  What command should be typed to make
a second copy of the current line?
Type "answer XX", where XX is the command.
#copyin
#user
#uncopyin
#match t.
#match .t.
You could just say "t.".
#log
#next
65.1a 10