[WIP] improve help message

frappyman.py

@@ -175,15 +175,14 @@ class FrappyManager(ServiceManager):
     USAGE = """
     Usage:
 
-      frappy list [instance]                                   *
-      frappy start <instance> <service> <cfgfiles>
-      frappy restart <instance> [<service>] [<cfgfiles>]       *
-      frappy stop <instance> [<service>]                       *
-      frappy listcfg <instance> [<service> | develop]       # list available cfg files
+      frappy list %(optional_ins)s
+      frappy start %(ins)s<service> <cfgfiles>
+      frappy restart %(ins)s[<service>] [<cfgfiles>]       %(remark)s
+      frappy stop %(ins)s[<service>]                       %(remark)s
+      frappy listcfg %(ins)s[<service> | develop]       # list available cfg files
 
       <service> is one of main, stick, addons
-      %s
-      * wildcards allowed, using '.' to replace 0 or more arbitrary characters in <instance>
+%(legend)s
     """
 
     def config_dirs(self, ins, service):