simplify output assignment

internal/builtin/providers/terraform/resource_data.go

@@ -76,7 +76,7 @@ func planDataStoreResourceChange(req providers.PlanResourceChangeRequest) (resp
 
 		// Output type must always match the input, even when it's null.
 		if input.IsNull() {
-			planned["output"] = cty.NullVal(input.Type())
+			planned["output"] = input
 		} else {
 			planned["output"] = cty.UnknownVal(input.Type())
 		}
@@ -92,7 +92,7 @@ func planDataStoreResourceChange(req providers.PlanResourceChangeRequest) (resp
 		// We need to check the input for the replacement instance to compute a
 		// new output.
 		if input.IsNull() {
-			planned["output"] = cty.NullVal(input.Type())
+			planned["output"] = input
 		} else {
 			planned["output"] = cty.UnknownVal(input.Type())
 		}