Don't print inferred types

Author: liufengyun

library/src/scala/tasty/reflect/Printers.scala

@@ -713,8 +713,10 @@ trait Printers
           if (vdef.symbol.flags.is(Flags.Mutable)) this += highlightKeyword("var ", color)
           else this += highlightKeyword("val ", color)
 
-          this += highlightValDef(name, color) += ": "
-          printTypeTree(tpt)
+          if (tpt.pos.exists && tpt.pos.start != tpt.pos.end) {
+            this += highlightValDef(name, color) += ": "
+            printTypeTree(tpt)
+          }
           rhs match {
             case Some(tree) =>
               this += " = "
@@ -830,7 +832,7 @@ trait Printers
               // type bounds already printed in `fn`
               this
             case _ =>
-              inSquare(printTypeOrBoundsTrees(args.filter(_.pos.exists), ", "))
+              inSquare(printTypeOrBoundsTrees(args.filter(arg => arg.pos.exists && arg.pos.start != arg.pos.end), ", "))
           }
 
         case Term.Super(qual, idOpt) =>