auto_discovery_link_tag(フォードの種類=:rss, URLオプション={}, オプション={})
auto_discovery_link_ta
#=> <link href="http://localhost:3000/" rel="alternate" title="RSS" type="application/rss+xml" />
auto_discovery_link_tag(:atom)
#=> <link href="http://localhost:3000/" rel="alternate" title="ATOM" type="application/rss+xml" />
auto_discovery_link_tag(:rss, {controller: "pages", action: "feed"})
#=> <link href="http://localhost:3000/pages/feed" rel="alternate" title="RSS" type="application/rss+xml" />
auto_discovery_link_tag(:rss, "http://www.example.com/feed.rss", {title: "Example RSS"})
#=> <link href="http://www.example.com/feed.rss" rel="alternate" title="Example RSS" type="application/rss+xml" />