Do not complete package as a member of some package

Author: nicolasstucki

compiler/src/dotty/tools/dotc/interactive/Completion.scala

@@ -253,6 +253,7 @@ object Completion {
            (mode.is(Mode.Term) && sym.isTerm)
         || (mode.is(Mode.Type) && (sym.isType || sym.isStable))
       ) &&
+      !sym.isPackageObject &&
       (sym ne defn.RepeatedParamClass) &&
       (sym ne defn.ByNameParamClass2x) &&
       (sym ne defn.EqualsPatternClass)

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

@@ -95,5 +95,6 @@ class TabcompleteTests extends ReplTest {
     val comp = tabComplete("import scala.")
     // check that there are no special symbols leaked: <byname>, <special-ops>, ...
     assertEquals(comp.find(_.startsWith("<")), None)
+    assert(!comp.contains("package"))
   }
 }