old_contents: """
  Define concatenated and minified assets
  
  If you set ASSETS_DEBUG = True in your config,
  Flask-Assets will output each source file individually instead of merging them.
  """
  # @see http://exploreflask.com/en/latest/static.html
  from flask_assets import Bundle, Environment
  
  bundles = {
  
      'js': Bundle(
          'js/jquery.auto-complete.min.js',
          'js/wbc.js',
          output='wbc.min.js',
          filters='jsmin'
      ),
  
      'css': Bundle(
          'css/normalize.css',
          'css/skeleton.css',
          'css/wbc.css',
          output='wbc.min.css',
          filters='cssmin'
      ),
  }
  
  
  def register_assets(app):
      """
      :type app flask.Flask
      """
      assets = Environment(app)
      assets.register(bundles)
  
new_contents: """
  Define concatenated and minified assets
  
  If you set ASSETS_DEBUG = True in your config,
  Flask-Assets will output each source file individually instead of merging them.
  """
  # @see http://exploreflask.com/en/latest/static.html
  from flask_assets import Bundle, Environment
  
  bundles = {
  
      'js': Bundle(
          'js/jquery.auto-complete.min.js',
          'js/wbc.js',
          output='wbc.%(version)s.min.js',
          filters='jsmin'
      ),
  
      'css': Bundle(
          'css/normalize.css',
          'css/skeleton.css',
          'css/wbc.css',
          output='wbc.%(version)s.min.css',
          filters='cssmin'
      ),
  }
  
  
  def register_assets(app):
      """
      :type app flask.Flask
      """
      assets = Environment(app)
      assets.register(bundles)
  
subject: put cb inside the generated file names