Don't ignore first argument in TryChange.

trychange.py

Index: trychange.py
diff --git a/trychange.py b/trychange.py
index b1b328ff2f1fe4534a6d51158443429f8bfcb46d..b85abbd7e2fd3d69f78335116c14d9192402a488 100755
--- a/trychange.py
+++ b/trychange.py
@@ -330,10 +330,9 @@ def _SendChangeHTTP(options):
   logging.info('Sending by HTTP')
   logging.info(description)
   logging.info(url)
+  logging.info(options.diff)
   if options.dry_run:
-    print options.diff
     return
-  logging.info(options.diff)
 
   try:
     logging.info('Opening connection...')
@@ -510,7 +509,8 @@ def TryChange(argv,
                         "optional if --issue is used, In that case, the "
                         "latest patchset will be used.")
   group.add_option("--dry_run", action='store_true',
-                   help="Just prints the diff and quits")
+                   help="Don't send the try job. This implies --verbose, so "
+                        "it will print the diff.")
   parser.add_option_group(group)
 
   group = optparse.OptionGroup(parser, "Try job options")
@@ -611,24 +611,18 @@ def TryChange(argv,
 
   options, args = parser.parse_args(argv)
 
-  # Note that the args array includes the script name, so
-  # a single argument results in len(args) == 2.
-
   # If they've asked for help, give it to them
-  if len(args) == 2 and args[1] == 'help':
+  if len(args) == 1 and args[0] == 'help':
     parser.print_help()
     return 0
 
   # If they've said something confusing, don't spawn a try job until you
   # understand what they want.
-  if len(args) > 1:
-    plural = ""
-    if len(args) > 2:
-      plural = "s"
-    print >> sys.stderr, (
-        'Argument%s \"%s\" not understood' % (plural, ' '.join(args[1:])))
-    parser.print_help()
-    return 1
+  if args:
+    parser.error('Extra argument(s) "%s" not understood' % ' '.join(args))
+
+  if options.dry_run:
+    options.verbose += 1
 
   LOG_FORMAT = '%(levelname)s %(filename)s(%(lineno)d): %(message)s'
   if not swallow_exception: