Refine condition for printing package objects

AN old-style package object of package `p` printed `package object p`.
Since there are now several possible toplevel source files, we can't
do the same for toplevel source file. I am not yet quite sure what to
do instead. For the moment, we just print the name of the generated object.

Author: odersky

compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala

@@ -807,7 +807,7 @@ class RefinedPrinter(_ctx: Context) extends PlainPrinter(_ctx) {
       }
     if (sym.is(ModuleClass)) {
       val name =
-        if (sym.isPackageObject) sym.owner.name
+        if (sym.isPackageObject && sym.name == tpnme.PACKAGE) sym.owner.name
         else sym.name.stripModuleClassSuffix
       kindString(sym) ~~ (nameString(name) + idString(sym))
     }