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"
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For this purpose the following works:

print v10 x 2; # prints 2 newlines
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print v10 x 1, v10; # also prints 2 newlines
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