Fix #6007 and #6008: Add tests

Author: biboudis

compiler/test-resources/repl/i6007

@@ -0,0 +1,10 @@
+scala> import quoted.Toolbox.Default._
+
+scala> val v = '{ (if true then Some(1) else None).map(v => v+1) }
+val v: quoted.Expr[Option[Int]] = Expr(<pickled tasty>)
+
+scala> v.show
+val res0: String = if (true) scala.Some.apply[scala.Int](1) else scala.None.map[scala.Int](((v: scala.Int) => v.+(1)))
+
+scala> v.run
+val res1: Option[Int] = Some(2)

tests/pos/i6008.scala

@@ -0,0 +1,6 @@
+import scala.quoted._
+
+class C {
+    type T = Int
+    def fn(e : Expr[T]) : Expr[T] = '{ $e }
+}