.ll 25
.pl 20
.nf
file1 and file2 #1
<<<<
file1 only
>>>>
.br
.mc |
file2 only
file2 only
.mc
file1 and file2 #2
.mc +
file2 only
.mc
file1 and file2 #3
<<<<
file1 only
file1 only
>>>>
.br
.mc *
.mc
file1 and file2 #4
file1 and file2 #5