Fix: Also print unique ids for symbols with meaningless names

Author: odersky

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

@@ -850,6 +850,8 @@ class RefinedPrinter(_ctx: Context) extends PlainPrinter(_ctx) {
         nameString(sym.owner.name)
       else if (sym.is(ModuleClass))
         nameString(sym.name.stripModuleClassSuffix)
+      else if (hasMeaninglessName(sym))
+        simpleNameString(sym.owner) + idString(sym)
       else
         nameString(sym)
     (keywordText(kindString(sym)) ~~ {