process: display: series: use change the delimiter char

Change the delimiter char from + to ↳ when printing events in a series.

Suggested-by: Adrian Moreno <[email protected]>
Signed-off-by: Antoine Tenart <[email protected]>

retis/src/process/display.rs

@@ -75,7 +75,7 @@ impl PrintSeries {
         }
 
         let mut res = Vec::new();
-        let mut delim = "+ ";
+        let mut delim = "↳ ";
         for line in lines.split('\n') {
             res.push(format!("{}{}{}", " ".repeat(n_spaces), delim, line));
             delim = "  ";