title: Pylint W1202 reporting using % but there's none
body: <p>The output from pylint states:</p>
  
  <blockquote>
    <p>nltk/nltk/tag/perceptron.py:203: [W1202(logging-format-interpolation), PerceptronTagger.train] Use % formatting in logging functions and pass the % parameters as arguments</p>
  </blockquote>
  
  <p>But looking at the code <a href="https://github.com/nltk/nltk/blob/develop/nltk/tag/perceptron.py#L203" rel="nofollow noreferrer">https://github.com/nltk/nltk/blob/develop/nltk/tag/perceptron.py#L203</a>, there isn't any usage of <code>%</code> string formatting:</p>
  
  <pre><code>logging.info("Iter {0}: {1}/{2}={3}".format(iter_, c, n, _pc(c, n)))
  </code></pre>
  
  <p><strong>Am I missing something or misinterpreting the W1202 message?</strong></p>
  
  <p><strong>How should the code line be change such that the W1202 goes away when pylinting?</strong></p>