old_contents: var util = require('util');
  
  var TITLE = `Catbee@2.0.0 (<a href="https://github.com/markuplab/catbee/issues "target="_blank">report an issue</a>)`;
  var AMP = /&/g;
  var LT = /</g;
  var GT = />/g;
  var QUOT = /\"/g;
  var SINGLE_QUOT = /\'/g;
  var ERROR_MESSAGE_REGEXP = /^(?:[\w$]+): (?:.+)\r?\n/i;
  var ERROR_MESSAGE_FORMAT = `<span style="color: red; font-size: 16pt; font-weight: bold;">%s%s</span>`;
  var NEW_LINE = /\r?\n/g;
  
  module.exports = {
    /**
     * Prints error with pretty formatting.
     * @param {Error} error Error to print.
     * @param {string} userAgent User agent information.
     * @returns {string} HTML with all information about error.
     */
    prettyPrint (error, userAgent) {
      if (!error || typeof (error) !== 'object') {
        return '';
      }
  
      var dateString = (new Date()).toUTCString() + ';<br/>';
      var userAgentString = (userAgent ? (userAgent + ';<br/>') : '');
      var name = (typeof (error.name) === 'string' ? error.name + ': ' : '');
      var message = String(error.message || '');
      var stack = String(error.stack || '').replace(ERROR_MESSAGE_REGEXP, '');
      var fullMessage = util.format(ERROR_MESSAGE_FORMAT, escape(name), escape(message));
  
      return '<div style="background-color: white; font-size: 12pt;">' +
        dateString +
        userAgentString +
        TITLE + '<br/><br/>' +
        fullMessage + '<br/><br/>' +
        escape(stack) +
        '</div>';
    }
  };
  
  /**
   * Escapes error text.
   * @param {string} value Error text.
   * @returns {string} escaped and formatted string.
   */
  function escape (value) {
    return value
      .replace(AMP, '&amp;')
      .replace(LT, '&lt;')
      .replace(GT, '&gt;')
      .replace(QUOT, '&quot;')
      .replace(SINGLE_QUOT, '&#39;')
      .replace(NEW_LINE, '<br/>');
  }
  
new_contents: var util = require('util');
  
  var TITLE = `Catbee@2.1.0 (<a href="https://github.com/markuplab/catbee/issues "target="_blank">report an issue</a>)`;
  var AMP = /&/g;
  var LT = /</g;
  var GT = />/g;
  var QUOT = /\"/g;
  var SINGLE_QUOT = /\'/g;
  var ERROR_MESSAGE_REGEXP = /^(?:[\w$]+): (?:.+)\r?\n/i;
  var ERROR_MESSAGE_FORMAT = `<span style="color: red; font-size: 16pt; font-weight: bold;">%s%s</span>`;
  var NEW_LINE = /\r?\n/g;
  
  module.exports = {
    /**
     * Prints error with pretty formatting.
     * @param {Error} error Error to print.
     * @param {string} userAgent User agent information.
     * @returns {string} HTML with all information about error.
     */
    prettyPrint (error, userAgent) {
      if (!error || typeof (error) !== 'object') {
        return '';
      }
  
      var dateString = (new Date()).toUTCString() + ';<br/>';
      var userAgentString = (userAgent ? (userAgent + ';<br/>') : '');
      var name = (typeof (error.name) === 'string' ? error.name + ': ' : '');
      var message = String(error.message || '');
      var stack = String(error.stack || '').replace(ERROR_MESSAGE_REGEXP, '');
      var fullMessage = util.format(ERROR_MESSAGE_FORMAT, escape(name), escape(message));
  
      return '<div style="background-color: white; font-size: 12pt;">' +
        dateString +
        userAgentString +
        TITLE + '<br/><br/>' +
        fullMessage + '<br/><br/>' +
        escape(stack) +
        '</div>';
    }
  };
  
  /**
   * Escapes error text.
   * @param {string} value Error text.
   * @returns {string} escaped and formatted string.
   */
  function escape (value) {
    return value
      .replace(AMP, '&amp;')
      .replace(LT, '&lt;')
      .replace(GT, '&gt;')
      .replace(QUOT, '&quot;')
      .replace(SINGLE_QUOT, '&#39;')
      .replace(NEW_LINE, '<br/>');
  }
  
subject: Bump version