Change test to default style

Author: rsoeldner

compiler/test/dotty/tools/repl/TabcompleteTests.scala

@@ -29,8 +29,12 @@ class TabcompleteTests extends ReplTest {
       comp.suggestions.sorted == List("slice", "sliding"))
   }
 
-  @Test def classModuleHiding: Unit =
-    fromInitialState{ implicit s => assert(tabComplete("scala.Predef").suggestions.isEmpty) }
+  @Test def tabCompleteModule: Unit =
+    fromInitialState{ implicit s =>
+      val comp = tabComplete("scala.Pred").suggestions
+    assertTrue(s""""Expected single element "Predef" got: ${comp}""",
+      comp == List("Predef"))
+    }
 
   @Test def autoCompleteValAssign: Unit =
     fromInitialState { implicit s => tabComplete("val x = 5") }