--- a/checker.py	Sun Jul 03 23:48:36 2016 +0800
+++ b/checker.py	Sun Jul 03 23:56:46 2016 +0800
@@ -184,7 +184,8 @@
 
 def main():
     parser = ArgumentParser()
-    parser.add_argument('config', help='configuration file (YAML)', type=FileType('r'))
+    helptext = 'project configuration file (YAML)'
+    parser.add_argument('config', type=FileType('r'), help=helptext)
     args = parser.parse_args()
     config = yaml.safe_load(args.config)
     try: