title: find + xargs + cat does not work with --name argument
body: <p>I'm trying to concatenate all the files of a  that ends with coref extension. </p>
  
  <p>This works (but add unwanted files):</p>
  
  <pre><code>find ../corpus/dev/txt/ | xargs cat
  </code></pre>
  
  <p>This not works.</p>
  
  <pre><code>find ../corpus/dev/txt/ -name '*.coref' | xargs cat
  </code></pre>
  
  <p>In the second comand find returns 1566 results but xrags cat does nothing. </p>
  
  <p>Why the -name arguments mess it all?</p>