Call fish_prompt after background job finishes

We don't need to call it if a job was stopped, because in that case
read_i() will fire fish_prompt already, because the newly stopped job
was probably a foreground job.

Fixes #1018

share/functions/fish_job_summary.fish

@@ -49,4 +49,8 @@ function fish_job_summary -a job_id is_foreground cmd_line signal_or_end_name si
                     $job_id $cmd_line $signal_or_end_name $signal_desc
             end
     end >&2
+
+    if test $is_foreground -eq 0; and test $signal_or_end_name != STOPPED
+        commandline -f repaint
+    end
 end