title: Export sequences to fasta wide format
body: <p>I'm trying to export aligned sequences to a fasta file one by one using <code>Bio::SeqIO</code>.
  The result is that the sequences are broken by a new line every 60 columns.
  How do I avoid that?<br>
  I'd like to have the sequences exported in a 'wide' format, i.e. no line breaks in the sequence.</p>
  
  <p>My code is roughly:</p>
  
  <pre><code>use Bio::SeqIO;
  my $seqin = Bio::SeqIO-&gt;new(-file =&gt; "&lt;$fastaFile", '-format' =&gt; 'Fasta');
  my $outname = fileparse($fastaFile, qr/\.[^\.]*$/) . "_sub.fasta";
  my $seqout = Bio::SeqIO-&gt;new(-file =&gt; "&gt;$outname", '-format' =&gt; 'Fasta');
  
  while(my $seq = $seqin-&gt;next_seq){
        # do something with $seq
        $seqout-&gt;write_seq($seq);
  }
  </code></pre>