Decrease minimum SHLVL for suspend without --force

There is some discussion on #2269

share/functions/suspend.fish

@@ -1,6 +1,6 @@
 # If the user hasn't set it, make sure our test level has a value
 if not set -q suspend_minimum_SHLVL
-    set -g suspend_minimum_SHLVL 3
+    set -g suspend_minimum_SHLVL 2
 end
 
 
@@ -11,6 +11,7 @@ function suspend -d "Suspend the current shell."
                       and not status --is-login
                 end
        end
+       echo Suspending %self
        kill -STOP %self
     else
        echo 2>&1 Cannot suspend login shell or SHLVL to low, use --force to force.