title: Lucene adds string with a space to index as two separate values
body: <p>What I'm trying to do is too add a value to index as follows:</p>
  
  <pre><code>doc.Add(new Field("field_name", value, Field.Store.YES, Field.Index.ANALYZED));
  </code></pre>
  
  <p>The value is <code>"Cell phones"</code>, so what it actually does is adding of two seperate values to index <code>"Cell"</code> and `"phones". How to make it to add one: "Cell phones"?</p>