Something like:

use strict;
use warnings;

my $run = 1;

while (<DATA>) {
    next if $run && m/^\n/;
    print;
    $run = m/^\n/;
}

__DATA__
data as per sample

[download]

with i/o adjusted for your requirements should do what you need to clean up multiple line breaks.

DWIM is Perl's answer to Gödel

In reply to Re^3: Double blank lines to single blank line by GrandFather
in thread Double blank lines to single blank line by proactive1

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