Improved code style

src/token/bench_test.go

@@ -19,7 +19,7 @@ func bench(n int) func(b *testing.B) {
 	return func(b *testing.B) {
 		input := bytes.Repeat(line, n)
 
-		for i := 0; i < b.N; i++ {
+		for range b.N {
 			token.Tokenize(input)
 		}
 	}