http://www.perlmonks.org?node_id=521281


in reply to Re: Why will v-strings be deprecated
in thread Why will v-strings be deprecated

And while you can use print v10 to print a newline, you can't use it to print two newlines (as opposed to one string with two newlines):
print v10; # prints newline. print v10, v10; # "No comma allowed after filehandle"

For this purpose the following works:

print v10 x 2; # prints 2 newlines
Or even:
print v10 x 1, v10; # also prints 2 newlines