The undef is not necessary, as per
split's documentation:
When assigning to a list, if LIMIT is omitted, Perl
supplies a
LIMIT one larger than the number of variables in the list,
to avoid unnecessary work.
Essentially, this means that all the extra text you're
worried about gets assigned to that nonexistent fourth
variable in the list on the left hand side.
Good thinking, but Perl beat you to it.
hdp.
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