title: svn diff: file marked as binary type
body: <p>I'm doing an <code>svn diff</code> on one of my files and svn is detecting it as a binary type. The file is readable plain text and I would like to be able to get a diff of this file. How do I tell SVN that this is not a binary file?</p>
  
  <pre><code>Cannot display: file marked as a binary type.
  svn:mime-type = application/octet-stream
  </code></pre>