!echo 1 > one
!echo 2 > two
put -t one two
#.*file already exists.*
put -t one three
!diff -u one three
put -A one two
!wc -l < two
# *2
put -a one two
!wc -l < two
# *3
put -A one nonesuch
#.*file does not exist.*
put -e one nonesuch
#.*file does not exist.*
