warning: Untested 
$_ = $finaloutput;
my $replace_from = ' ';
my $replace_to = '\n';
my $last_position="76";
my $location =  rindex(substr($_,0,$last_position),$replace_from);
s/(.{0,$location})./$1$replace_to/;
print;

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In reply to Re: Matching positions with lookarounds by artist
in thread Matching positions with lookarounds by blahblah

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