More examples at the end of trychange.py help and move the -R flag to the right group

git-try

Index: git-try
diff --git a/git-try b/git-try
index 8cb807731d8422f77e27e1ee3794657bf47ebecc..9eaec61bac10819f4c36e6b9c5ff6d5ea8950bf5 100755
--- a/git-try
+++ b/git-try
@@ -44,4 +44,10 @@ if __name__ == '__main__':
       args.extend(['--rietveld_url', GetRietveldServerUrl()])
   # Hack around a limitation in logging.
   logging.getLogger().handlers = []
-  sys.exit(trychange.TryChange(args, [], False, 'git-try'))
+  sys.exit(trychange.TryChange(
+    args, file_list=[], swallow_exception=False,
+    prog='git-try',
+    extra_epilog='\n'
+                  'git-try will diff against your tracked branch and will '
+                      'detect your rietveld\n'
+                  'code review if you are using git-cl\n'))