doc: sync guide.org with cli.py

Reviewed-By: Martin Basti <mbasti@redhat.com>

doc/guide/guide.org

@@ -738,19 +738,19 @@ cli_plugins = (
     show_mappings,
 )
 
+
 def run(api):
     error = None
     try:
-        (options, argv) = api.bootstrap_with_global_options(context='cli')
+        (_options, argv) = api.bootstrap_with_global_options(context='cli')
         for klass in cli_plugins:
-            api.register(klass)
-        api.load_plugins()
+            api.add_plugin(klass)
         api.finalize()
-        if not 'config_loaded' in api.env:
+        if not 'config_loaded' in api.env and not 'help' in argv:
             raise NotConfiguredError()
         sys.exit(api.Backend.cli.run(argv))
     except KeyboardInterrupt:
-        print ''
+        print('')
         api.log.info('operation aborted')
     except PublicError as e:
         error = e