title: Using Bio.SeqIO to write single-line FASTA
body: <p>QIIME requests this (<a href="http://qiime.org/documentation/file_formats.html" rel="nofollow">here</a>) regarding the fasta files it receives as input:</p>
  
  <p><code>The file is a FASTA file, with sequences in the single line format. That is, sequences are not broken up into multiple lines of a particular length, but instead the entire sequence occupies a single line.</code></p>
  
  <p><code>Bio.SeqIO.write</code> of course follows the <a href="http://en.wikipedia.org/wiki/FASTA_format" rel="nofollow">format recommendations</a>, and splits the sequence every 80 bps. 
  I could write my own writer to write those "single-line" fastas - but my question is if there's a way that I missed to make <code>SeqIO</code> do that.</p>