list all not running on-watch service

slapos/grid/SlapObject.py

@@ -903,8 +903,7 @@ class Partition(object):
           bad_service_list.append(process['name'])
     if len(bad_service_list) > 0:      
       raise ChildProcessError(
-        "The following on-watch service(es) is not running:\n, \
-          %s, \
+        "The following on-watch service(es) is not running:\n, %s\n, \
         for the details, please check the corresponding log." %
         '\n'.join(bad_service_list))