title: Where is "==" method in Scala List API?
body: <p>I am reading "Programming in Scala" book, it mentioned <code>==</code> is <code>final</code> in class <code>Any</code>, which mean subclass is not able to override it, so when I see this example <code>List(1,2) == List(1,2)</code>, I went to find the <a href="http://www.scala-lang.org/api/current/scala/collection/immutable/List.html" rel="nofollow noreferrer">API</a> doc, I couldn't find the method <code>==</code>, how Scala define that method in <code>List</code> actually? Why it is not in the API doc?</p>
  
  <p>If it is not overwriten by <code>List</code> class, how the comparison can be based on <code>List</code> item instead of object reference?</p>