TemplateData provides an example field which some wikis populate. We should use that as placeholder if there is no autovalue is provided.
@JJMC89 If both example and default are specified, should 'example' be shown as placeholder or 'default'? I am yet to come across a template where the templatedata contains both, so that will be an edge case. But what makes more sense to take precedence?
Also, is it okay if I merge that task here?