[WIP] improve help message

seaman.py

@@ -56,17 +56,16 @@ class SeaManager(ServiceManager):
     USAGE = """
     Usage:
 
-      sea gui <instance>
-      sea <instance>                          # the same as sea gui <instance>
-      sea cli <instance>                      # the same as old seacmd
-      sea start <instance> [service]       *  # the same as old 'monit start sea'
-      sea restart <instance> [service]     *
-      sea stop <instance> [service]        *
-      sea list [instance]                  *
+      sea gui %(ins)s
+      sea %(ins)s                          # the same as sea gui <instance>
+      sea cli %(ins)s                      # the same as old seacmd
+      sea start %(ins)s[service]       %(remark)s  # the same as old 'monit start sea'
+      sea restart %(ins)s[service]     %(remark)s
+      sea stop %(ins)s[service]        %(remark)s
+      sea list %(optional_ins)s
 
       [service] is empty or one of sea, graph
-      %s
-      * wildcards allowed, using '.' to replace 0 or more arbitrary characters in <instance>
+%(legend)s
     """
 
     def do_cli(self, ins):