SI-5784 Scaladoc: {Abstract,Alias} type templates

Normally scaladoc won't generate template pages for anything other than
packages, classes, traits and objects. But using the @template
annotation on {abstract,alias} types, they get their own page and take
part as full members in the diagrams. Furthermore, when looking for the
companion object, if a value of type T is in scope, T will be taken as
the companion object (even though it might be a class)

All templates, including types are listed on the left navigation pane,
so now adding @template to String can get scaladoc to generate (a
no-comments) page for java.lang.String.

The {abstract, alias} type icons need to be updated -- I just took the
class icons and added a small x to them -- but they shoud be something
else (maybe an underscore?)i

TO USE THIS PATCH:
<pre>
/** @contentDiagram */ // tells scaladoc to create a diagram of the
                       // templates contained in trait Base
trait Base {
  /** @template */ // tells scaladoc to create a page for Foo
  type T < Foo
  trait Foo { def foo: Int }
}

/** @contentDiagram */
trait Api extends Base {
  /** @template */
  override type T <: FooApi
  trait FooApi extends Foo { def bar: String }
}
</pre>

1 files changed, 3 insertions, 1 deletions

diff --git a/test/scaladoc/run/SI-5533.scala b/test/scaladoc/run/SI-5533.scala
index e7b5f57860..989d9aa13a 100644
--- a/test/scaladoc/run/SI-5533.scala
+++ b/test/scaladoc/run/SI-5533.scala
@@ -32,6 +32,8 @@ object Test extends ScaladocModelTest {
     val B = b._class("B")
     val D = b._class("D")
     testDiagram(B, B.contentDiagram, 2, 1)
-    testDiagram(D, D.contentDiagram, 2, 1)
+    // unfortunately not all packages, as B1 extends A.this.A1 and it gets the wrong member -- maybe we should model
+    // things as we do for symbols?
+    testDiagram(D, D.contentDiagram, 3, 2)
   }
 }
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