Tests that CSSPropertyPrompt properly builds suggestions.

--blue-color
  text: --blue-color)
  priority: 1
  subtitle: undefined
  subtitleRenderer: function () { [native code] }
--red-color
  text: --red-color)
  priority: 1
  subtitle: undefined
  subtitleRenderer: function () { [native code] }
--other
  text: --other)
  priority: 1
  subtitle: undefined
  subtitleRenderer: function () { [native code] }