remove --entitytype from help output

tests/samples/output/test_help_contents

@@ -13,7 +13,7 @@ Common interface for the WakaTime api.
 optional arguments:
   -h, --help            show this help message and exit
   --entity FILE         absolute path to file for the heartbeat; can also be a
-                        url, domain, or app when --entitytype is not file
+                        url, domain, or app when --entity-type is not file
   --key KEY             your wakatime api key; uses api_key from
                         ~/.wakatime.cfg by default
   --write               when set, tells api this heartbeat was triggered from

wakatime/main.py

@@ -102,7 +102,7 @@ def parseArguments():
     parser.add_argument('--entity', dest='entity', metavar='FILE',
             action=FileAction,
             help='absolute path to file for the heartbeat; can also be a '+
-                 'url, domain, or app when --entitytype is not file')
+                 'url, domain, or app when --entity-type is not file')
     parser.add_argument('--file', dest='file', action=FileAction,
             help=argparse.SUPPRESS)
     parser.add_argument('--key', dest='key',