diff --git a/internal/pkg/transformers/step.go b/internal/pkg/transformers/step.go
index f8e4122af..0fd201694 100644
--- a/internal/pkg/transformers/step.go
+++ b/internal/pkg/transformers/step.go
@@ -110,18 +110,23 @@ func transformerStepParseCLI(
 			transformerStepUsage(os.Stdout, true, 0)
 
 		} else if opt == "-a" {
+			// TODO: append ...
 			stepperNames = cli.VerbGetStringArrayArgOrDie(verb, opt, args, &argi, argc)
 
 		} else if opt == "-f" {
+			// TODO: append ...
 			valueFieldNames = cli.VerbGetStringArrayArgOrDie(verb, opt, args, &argi, argc)
 
 		} else if opt == "-g" {
+			// TODO: append ...
 			groupByFieldNames = cli.VerbGetStringArrayArgOrDie(verb, opt, args, &argi, argc)
 
 		} else if opt == "-d" {
+			// TODO: append ...
 			stringAlphas = cli.VerbGetStringArrayArgOrDie(verb, opt, args, &argi, argc)
 
 		} else if opt == "-o" {
+			// TODO: append ...
 			ewmaSuffixes = cli.VerbGetStringArrayArgOrDie(verb, opt, args, &argi, argc)
 
 		} else if opt == "-F" {
@@ -616,10 +621,10 @@ func (stepper *tStepperEWMA) process(
 	} else {
 		for i := range stepper.alphas {
 			curr := valueFieldValue.Copy()
-			// xxx pending pointer-output refactor
-			product1 := bifs.BIF_times(curr, stepper.alphas[i])
-			product2 := bifs.BIF_times(stepper.prevs[i], stepper.oneMinusAlphas[i])
-			next := bifs.BIF_plus_binary(product1, product2)
+			next := bifs.BIF_plus_binary(
+				bifs.BIF_times(curr, stepper.alphas[i]),
+				bifs.BIF_times(stepper.prevs[i], stepper.oneMinusAlphas[i]),
+			)
 			inrec.PutCopy(stepper.outputFieldNames[i], next)
 			stepper.prevs[i] = next
 		}
diff --git a/test/input/window2.mlr b/test/input/window2.mlr
index 93be27d58..3cc824f94 100644
--- a/test/input/window2.mlr
+++ b/test/input/window2.mlr
@@ -1,27 +1,15 @@
 begin {
   # Input parameters
   # They can do 'mlr put -s input_field_names=x,y ...'
-  if (is_absent(@window_size_backward)) {
-    @window_size_backward = 3;
-  }
-  if (is_absent(@window_size_forward)) {
-    @window_size_forward = 3;
-  }
-  # In Miller 6 (Go port) we'll have arrays and you'll be able to do
-  # @input_field_names = ["x", "y"].
-  if (is_absent(@input_field_names)) {
-    @input_field_names = splitnv("x,y", ",")
-  } else {
-    @input_field_names = splitnv(@input_field_names, ",")
-  }
+  @window_size_backward ??= 3;
+  @window_size_forward ??= 3;
+  @input_field_names ??= "x,y";
+  @input_field_names = splitnv(@input_field_names, ",");
 
   # Initialization
   @window_size = @window_size_backward + 1 + @window_size_forward;
   @center_record_index = @window_size_backward; # index 0-up
-  @output_field_names = {};
-  for (_, name in @input_field_names) {
-    @output_field_names[name] = name . "_avg";
-  }
+  @output_field_names = apply(@input_field_names, func(k,v) { return {v: v . "_avg"}});
   @window_records = {};
   # dump;
 }
@@ -50,10 +38,7 @@ for (_, name in @input_field_names) {
 }
 
 # Emit the record from the window center, with averages attached to it
-print "HMM?";
-print NR;
 if (NR > @center_record_index) {
-print "YUP!";
   output_record = @window_records[@center_record_index];
   for (_, name in @input_field_names) {
     output_record[@output_field_names[name]] = sums[name] / denominator;