redis-cli latency dist: add new top HL.

src/redis-cli.c

@@ -1140,6 +1140,7 @@ void showLatencyDistSamples(struct distsamples *samples, long long tot) {
 /* Show the legend: different buckets values and colors meaning, so
  * that the spectrum is more easily readable. */
 void showLatencyDistLegend(void) {
+    printf("---------------------------------------------\n");
     printf(". - * #          .01 .125 .25 .5 milliseconds\n");
     printf("1,2,3,...,9      from 1 to 9     milliseconds\n");
     printf("A,B,C,D,E        10,20,30,40,50  milliseconds\n");