Fix printing super

Author: nicolasstucki

library/src/scala/tasty/util/ShowSourceCode.scala

@@ -316,10 +316,13 @@ class ShowSourceCode[T <: Tasty with Singleton](tasty0: T) extends Show[T](tasty
             this += "]"
         }
 
-      case Term.Super(qual, tptOpt) =>
-        printTree(qual)
-        this += ".super"
-        // TODO use tptOpt?
+      case Term.Super(qual, idOpt) =>
+        this += "super"
+        for (id <- idOpt) {
+          val Id(name) = id
+          this += "[" += name += "]"
+        }
+        this
 
       case Term.Typed(term, tpt) =>
         tpt.tpe match {

tests/pos/simpleSuper.decompiled

@@ -0,0 +1,18 @@
+/** Decompiled from out/posTestFromTasty/pos/simpleSuper/foo/A.class */
+package foo {
+  class A() {
+    def foo: scala.Int = 1
+  }
+}
+/** Decompiled from out/posTestFromTasty/pos/simpleSuper/foo/B.class */
+package foo {
+  trait B() extends java.lang.Object {
+    def foo: scala.Int = 2
+  }
+}
+/** Decompiled from out/posTestFromTasty/pos/simpleSuper/foo/C.class */
+package foo {
+  class C() extends foo.A() with foo.B {
+    override def foo: scala.Int = super.foo.+(super[B].foo)
+  }
+}

tests/pos/simpleSuper.scala

@@ -0,0 +1,13 @@
+package foo
+
+class A {
+  def foo: Int = 1
+}
+
+trait B {
+  def foo: Int = 2
+}
+
+class C extends A with B {
+  override def foo: Int = super.foo + super[B].foo
+}