title: How to validate non breaking space in CKEditor
body: <p>Well i have the <a href="/questions/tagged/ckeditor" class="post-tag" title="show questions tagged &#39;ckeditor&#39;" rel="tag">ckeditor</a> in my page when the user keep entering spaces only, then the empty validation meant that it is not empty because it contains the <code>&amp;nbsp;</code> inside the <code>&lt;p&gt;&lt;/p&gt;</code> so the editor content is not empty but when we see that content in html it will display nothing because its non breaking spaces. </p>
  
  <p>Now issue is that how validate that inside the editor no one can put like spaces like that.</p>