tests: wrap ignored test failures in braces

tests/runtests.pl

@@ -5588,7 +5588,13 @@ foreach $testnum (@at) {
     $total++; # number of tests we've run
 
     if($error>0) {
-        $failed.= "$testnum ";
+        if($error==2) {
+            # ignored test failures are wrapped in ()
+            $failed.= "($testnum) ";
+        }
+        else {
+            $failed.= "$testnum ";
+        }
         if($postmortem) {
             # display all files in log/ in a nice way
             displaylogs($testnum);