code: function mimeFormatLookup (mime) {
          var charset = require('charset')(mime);
  
          // sanitise the mime argument
          mime = String(mime).toLowerCase().replace(/\s/g, E).replace(/^([^;]+).*$/g, '$1');
          var result = db[mime] || module.exports.guess(mime);
  
          // add the charset info to the mime.
          result && charset && (result.charset = charset);
          result && (result.source = mime); // store the sanitised mime
          return result;
      }
docs: Finds the mime-format of the provided Content-Type
  @param {String} mime - Content-Type for which you want to find the mime format. e.g <b><i>application/xml</i></b>.
  @returns {Object}
  @example <caption>Basic usage</caption>
  mimeFormat.lookup('application/xml');
  
  // Output
  // {
  //   "type": "text",
  //   "format": "xml"
  // }
  
  @example <caption>Content-Type with charset</caption>
  mimeFormat.lookup('application/xml; charset=gBk');
  
  // Output
  // {
  //   "type": "text",
  //   "format": "xml",
  //   "charset": "gBk"
  // }
  
  @example <caption>Unknown Content-Type</caption>
  mimeFormat.lookup('random/abc');
  
  // Output
  // {
  //   "type": "unknown",
  //   "format": "raw",
  //   "guessed": true,
  //   "orphan": true
  // }