:sparkles: (Go) writing benchmark for iteration funcion

Go/iteration/repeat_test.go

···
          t.Errorf("expected %q but got %q", expected, repeated)
     }
 }
+
+func BenchmarkRepeat(b *testing.B) {
+    for i := 0; i < b.N; i++ {
+        Repeat("a")
+    }
+}