title: configparser without whitespace surrounding operator
body: <p>This script:</p>
  
  <pre><code>import ConfigParser
  
  config = ConfigParser.ConfigParser()
  config.optionxform = str
  with open('config.ini', 'w') as config_file:
      config.add_section('config')
      config.set('config', 'NumberOfEntries', 10)
      config.write(config_file)
  </code></pre>
  
  <p>produces:</p>
  
  <pre><code>[config]
  NumberOfEntries = 10
  </code></pre>
  
  <p>where <code>key</code> and <code>property</code> are not delimited by "=" but with " = " (equal sign surrounded by spaces).</p>
  
  <p>How to instruct Python, to use "=" as delimiter with ConfigParser?</p>