title: pyaiml21 loadBrain method from Kernel not working
body: <p>using Python 3.8.10 on Linux Mint</p>
  <p>I have stripped my aiml down to a minimal version to test with but the <code>loadBrain</code> method does not sucessfully load the brain saved.</p>
  <p>here is the aiml code, as 'q.aiml'</p>
  <pre><code>    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
      &lt;aiml&gt;
          &lt;category&gt;
              &lt;pattern&gt;*&lt;/pattern&gt;
              &lt;template&gt;test successful&lt;/template&gt;
          &lt;/category&gt;
      &lt;/aiml&gt;
  </code></pre>
  <p>and here is the python, hugely simple</p>
  <pre><code>    from pyaiml21 import Kernel
      k=Kernel()
      # k.loadBrain('q.brn')
      k.learn('q.aiml')
      while True:
          a=input('&gt;')
          if a == 'quit':
              break
          else:
              print (k.respond(a,'luke'))
      k.saveBrain('q.brn')
  </code></pre>
  <p>you can see that I run it using the <code>learn</code> method the first time. Then on the next run I comment that out and uncomment the <code>loadBrain</code> line. No joy.</p>
  <p>I just get</p>
  <pre><code>    &gt;test
      unknown
  </code></pre>
  <p>as output, when I am expecting 'test successful' obviously. Note that the <code>saveBrain</code> method does save a non-empty file. Can I assume it is <code>loadBrain</code> that is broken??</p>