old_contents: /**
   * @fileoverview Classes to produce farts satisfying various user-defined properties.
   * @version 0.0.14
   * @license GNU Lesser General Public License, version 2.1
   * @author toiletjs (https://twitter.com/toiletjs)
   * 
   * TODO(toiletjs): Use React. See #4 (v2).
   */
  
  class AbstractBaseFart {
    /**
     * Initializes farts.
     * @param {boolean=} opt_isWet Whether the fart is wet. (Optional)
     * @param {boolean=} opt_isSilentButDeadly Whether the fart is silent but deadly. (Optional)
     */
    constructor(opt_isWet, opt_isSilentButDeadly) {
      this.isWet = Boolean(opt_isWet);
      this.isSilentButDeadly = Boolean(opt_isSilentButDeadly);
    }
    
    /**
     * Farts.
     */
    fart() {}
  }
  
  class Fart extends AbstractBaseFart {
    /**
     * Farts.
     */
    fart() {
      if (this.isSilentButDeadly) {
        while(true);
      }
      if (this.isWet) {
        console.log('pfffffpfpfpffffff?');
      } else {
        console.log('poooOOOot.');
      }
    }
  }
  
  class Shart extends AbstractBaseFart {
    /**
     * Sharts.
     */
    fart() {
      // Note that this.isWet is not checked here as all sharts are considered wet.
      console.log('plfffffpfffpllffff');
    }
  }
  
new_contents: /**
   * @fileoverview Classes to produce farts satisfying various user-defined properties.
   * @version 0.0.14
   * @license GNU Lesser General Public License, version 2.1
   * @author toiletjs (https://twitter.com/toiletjs)
   * 
   * TODO(toiletjs): Use React. See #4 (v2).
   */
  
  class AbstractBaseFart {
    /**
     * Initializes farts.
     * @param {boolean=} opt_isWet Whether the fart is wet. (Optional)
     * @param {boolean=} opt_isSilentButDeadly Whether the fart is silent but deadly. (Optional)
     */
    constructor(opt_isWet, opt_isSilentButDeadly) {
      this.isWet = Boolean(opt_isWet);
      this.isSilentButDeadly = Boolean(opt_isSilentButDeadly);
    }
    
    /**
     * Farts.
     */
    fart() {}
  }
  
  class Fart extends AbstractBaseFart {
    /**
     * Farts.
     */
    fart() {
      if (this.isSilentButDeadly) {
        while(true);
      }
      if (this.isWet) {
        console.log('pfffffpfpfpffffff?');
      } else {
        console.log('poooOOOot.');
      }
    }
  }
  
  class Shart extends AbstractBaseFart {
    /**
     * Sharts.
     */
    fart() {
      // Note that this.isWet is not checked here as all sharts are considered wet.
      console.log('%c plfffffpfffpllffff', 'color: brown;');
    }
  }
  
subject: Make sharts brown