title: Completion before and after word vim
body: <p>I added a dictionnary with this kind of words : </p>
  
  <pre><code>foo.bar
  this.is.a.test
  </code></pre>
  
  <p>I did <code>:set iskeyword+=.</code> to have completion works despite dots :</p>
  
  <p>When I type <code>fo&lt;TAB&gt;</code> --> <code>foo.bar</code></p>
  
  <p>But I would like to have also this kind of completion : </p>
  
  <p><code>test&lt;TAB&gt;</code> --> <code>this.is.a.test</code></p>
  
  <p>I mean, I won't type always the beginning of a word.</p>
  
  <p>I hope I was clear</p>
  
  <p>Thanks in advance</p>