rust: Make benchmarker generate readme markdown

rust/src/main.rs

@@ -68,7 +68,7 @@ fn main() {
         for day in 0..days.len() {
             let first_run = days[day](false);
             if first_run.as_nanos() == 0 {
-                println!("Day {:>2}: skipped", day + 1);
+                println!("|         {:>2} |            - |", day + 1);
                 continue;
             }
 
@@ -79,11 +79,10 @@ fn main() {
             for _ in 0..repetitions {
                 elapsed += days[day](false) / repetitions;
             }
-            println!("Day {:>2}: {:?}", day + 1, elapsed);
+            println!("|         {:>2} | {:>10.2}µs |", day + 1, elapsed.as_secs_f64() * 1_000_000.0);
             total += elapsed;
         }
 
-        println!("--------------------");
-        println!("Total:  {:?}", total);
+        println!("| **Total:** | {:>10.3}ms |", total.as_secs_f64() * 1_000.0);
     }
 }