client/clientutil: correct some docstrings and bump copyright

client/clientutil/service_scope_test.go

@@ -1,7 +1,7 @@
 // -*- Mode: Go; indent-tabs-mode: t -*-
 
 /*
- * Copyright (C) 2022 Canonical Ltd
+ * Copyright (C) 2024 Canonical Ltd
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
@@ -53,7 +53,6 @@ func (s *serviceScopeSuite) TestUsers(c *C) {
 		opts     clientutil.ServiceScopeOptions
 		expected client.UserSelector
 	}{
-		// when expected is nil it means both scopes
 		{clientutil.ServiceScopeOptions{}, client.UserSelector{Names: []string{}, Selector: client.UserSelectionList}},
 		{clientutil.ServiceScopeOptions{User: true}, client.UserSelector{Selector: client.UserSelectionSelf}},
 		{clientutil.ServiceScopeOptions{Usernames: "all"}, client.UserSelector{Selector: client.UserSelectionAll}},
@@ -72,7 +71,6 @@ func (s *serviceScopeSuite) TestInvalidOptions(c *C) {
 		opts     clientutil.ServiceScopeOptions
 		expected string
 	}{
-		// when expected is nil it means both scopes
 		{clientutil.ServiceScopeOptions{Usernames: "foo"}, `only "all" is supported as a value for --users`},
 		{clientutil.ServiceScopeOptions{User: true, System: true}, `--system and --user cannot be used in conjunction with each other`},
 		{clientutil.ServiceScopeOptions{Usernames: "all", User: true}, `--user and --users cannot be used in conjunction with each other`},