Made test output more readable.

bash.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+kill_child_jobs() {
+    # From https://stackoverflow.com/a/360275
+    while kill %% 2>/dev/null; do sleep 0; done
+}

test/test-all.sh

@@ -9,6 +9,7 @@ echo "    ∞=script does not halt (after 1 second timeout)"
 echo "    X=disown unsupported by shell"
 echo "    ☠=all children killed"
 echo "    🏃=all children still running"
+echo "    ✔️=expected result (job killed, disowned child alive)"
 echo
 
 printf '\t'

test/test-kill-child-jobs.sh

@@ -49,23 +49,23 @@ sleep 0.1s
 
 if grep -q '^shell does not support disown$' "$TMP"
 then
-    printf "X"
+    printf 'X'
 fi
 
 if ! grep -q '^disowned outlived parent.$' "$TMP"
 then
     # disowned should have outlived parent
     EXITCODE=2
-    printf "☠"
+    printf '☠'
 elif grep -q '^job outlived parent.$' "$TMP"
 then
     # job should not outlive parent
     EXITCODE=3
-    printf "🏃"
+    printf '🏃'
 else
     # all good
     EXITCODE=0
-    printf '%s' "$SHELL"
+    printf '✔️'
 fi
 
 rm -f "$TMP"