fix printerstest

Author: adriaanm

test/junit/scala/reflect/internal/PrintersTest.scala

@@ -1012,7 +1012,7 @@ trait ValAndDefPrintTests {
 
   @Test def testDefWithLazyVal2 = assertPrintedCode(sm"""
     |def a = {
-    |  lazy val test: scala.Unit = {
+    |  lazy val test: Unit = {
     |    scala.Predef.println();
     |    scala.Predef.println()
     |  };