Fix new job control test; changelog

CHANGELOG.rst

@@ -1,7 +1,10 @@
 fish 4.0.9 (released ???)
 =========================
 
-This release fixes a regression in 4.0.6 that caused shifted keys to not be inserted on some terminals.
+This release fixes
+- a regression in 4.0.6 causing shifted keys to not be inserted on some terminals (:issue:`11813`).
+- a regression in 4.0.6 causing the build to fail on systems where ``char`` is unsigned (:issue:`11804`).
+- a regression in 4.0.0 causing a crash on an invalid :doc:`bg <cmds/bg>` invocation.
 
 --------------
 

tests/checks/job-control-noninteractive.fish

@@ -19,5 +19,15 @@ $fish -c 'status job-control full ; $fth report_foreground' &
 wait
 #CHECKERR: background
 
-$fish -c 'sleep .2 & bg %1'
-#CHECKERR: bg: Can't put job 1, 'sleep .2 &' to background because it is not under job control
+$fish -c '
+    function __fish_print_help
+        if set -q argv[2]
+            echo Error-message: $argv[2] >&2
+        end
+        echo Documentation for $argv[1] >&2
+        return 1
+    end
+    sleep .2 & bg %1
+'
+#CHECKERR: Error-message: bg: Can't put job 1, 'sleep .2 &' to background because it is not under job control
+#CHECKERR: Documentation for bg