         name = hotkeyInfo.readableName
       @_postMessage "  #{name}: #{hotkeyInfo.description}", 'notice help'
 
-  _addWhitespace: ->
-    @_postMessage()
-
 exports.HelpMessageRenderer = HelpMessageRenderer
  #     readableName: string}>} hotkeys
  ##
  renderHotkeys: (hotkeys) ->
    @_addWhitespace()
    @_postMessage "Keyboard Shortcuts:", 'notice help'
    @_addWhitespace()
    @_printHotkeys hotkeys

  ##
  # Displays a list of hotkeys and their descriptions.
  # @param {Object.<string: {description: string, group: string,
  #     readableName: string}>} hotkeys
  ##
  _printHotkeys: (hotkeys) ->
    groupsVisited = {}
    for id, hotkeyInfo of hotkeys
      if hotkeyInfo.group

  ##
  render: (commands) ->
    @_commands = commands
    @_postMessage()
    @_printCommands()
    @_postMessage "Type '/help <command>' to see details about a specific command.",
        'notice help'
