use a more modern writing style to simplify code (#7182)

Signed-off-by: joemicky <joemickychang@outlook.com>
Co-authored-by: Matt Holt <mholt@users.noreply.github.com>

replacer_test.go

@@ -516,7 +516,7 @@ func BenchmarkReplacer(b *testing.B) {
 		},
 	} {
 		b.Run(bm.name, func(b *testing.B) {
-			for i := 0; i < b.N; i++ {
+			for b.Loop() {
 				rep.ReplaceAll(bm.input, bm.empty)
 			}
 		})