title: Vim and snipMate (plugin) - adding new snippet won't work
body: <p>I am trying to create a new snippet to my snipMate plugin.</p>
  
  <p>I work with some files called (i.e.) myfile.endfile</p>
  
  <p>All .endfile files should have the same "snippet" like .html files. 
  So I did</p>
  
  <pre><code>cp html.snippet endfile.snippet
  </code></pre>
  
  <p>in my ~/.vim/snippets directory.</p>
  
  <p>SnipMate is working with all present snippets, but not with my new created one.
  Any suggestions for this problem?</p>
  
  <p>(Btw: after creating the new .snippet file, I ran <code>:helptags ~/.vim/doc</code> command in an vim instance.)</p>