title: Pandoc: no line wrapping when converting to HTML
body: <p>I am converting from Markdown to HTML like so:</p>
  
  <p><code>pandoc --columns=70 --mathjax -f markdown input.pdc -t html -Ss &gt; out.html
  </code></p>
  
  <p>Everything works fine, except for the fact that the text doesn't get wrapped. I tried different columns lengths, no effect. Removed options, no go. Whatever I tried, the HTML just doesn't get wrapped. I search the bug tracker, but there don't seem to be any open bugs relating to this issue. I also checked the documentation, but as far as I could glean, the text ought be line-wrapped... So, have I stumbled into a bug?</p>
  
  <p>I'm using pandoc version 1.12.4.2.</p>
  
  <p>Thanks in advance for your help!</p>