fix(tabwriter): update for loop (#4406)

internal/tabwriter/tabwriter_test.go

@@ -700,7 +700,7 @@ func BenchmarkTable(b *testing.B) {
 			b.Run(fmt.Sprintf("%dx%d", w, h), func(b *testing.B) {
 				b.Run("new", func(b *testing.B) {
 					b.ReportAllocs()
-					for i := 0; i < b.N; i++ {
+					for range b.N {
 						w := tabwriter.NewWriter(io.Discard, 4, 4, 1, ' ', 0) // no particular reason for these settings
 						// Write the line h times.
 						for range h {
@@ -713,7 +713,7 @@ func BenchmarkTable(b *testing.B) {
 				b.Run("reuse", func(b *testing.B) {
 					b.ReportAllocs()
 					w := tabwriter.NewWriter(io.Discard, 4, 4, 1, ' ', 0) // no particular reason for these settings
-					for i := 0; i < b.N; i++ {
+					for range b.N {
 						// Write the line h times.
 						for range h {
 							w.Write(line)
@@ -732,7 +732,7 @@ func BenchmarkPyramid(b *testing.B) {
 		line := bytes.Repeat([]byte("a\t"), x)
 		b.Run(strconv.Itoa(x), func(b *testing.B) {
 			b.ReportAllocs()
-			for i := 0; i < b.N; i++ {
+			for range b.N {
 				w := tabwriter.NewWriter(io.Discard, 4, 4, 1, ' ', 0) // no particular reason for these settings
 				// Write increasing prefixes of that line.
 				for j := range x {
@@ -754,7 +754,7 @@ func BenchmarkRagged(b *testing.B) {
 	for _, h := range [...]int{10, 100, 1000} {
 		b.Run(strconv.Itoa(h), func(b *testing.B) {
 			b.ReportAllocs()
-			for i := 0; i < b.N; i++ {
+			for range b.N {
 				w := tabwriter.NewWriter(io.Discard, 4, 4, 1, ' ', 0) // no particular reason for these settings
 				// Write the lines in turn h times.
 				for j := range h {
@@ -782,7 +782,7 @@ lines
 
 func BenchmarkCode(b *testing.B) {
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		w := tabwriter.NewWriter(io.Discard, 4, 4, 1, ' ', 0) // no particular reason for these settings
 		// The code is small, so it's reasonable for the tabwriter user
 		// to write it all at once, or buffer the writes.