r1330385 | stsp | 2012-04-25 16:20:39 +0000 (Wed, 25 Apr 2012)

Improve error message shown when a subcommand receives invalid arguments.

* subversion/svn/main.c
  (main): When a subcommand got invalid arguments, svn used to say
    "Try 'svn help' for more info". But usually the best thing to do is
    to look up documentation of the specific subcommand that failed.
    So include the subcommand name in the message, for instance:
    "Try 'svn help resolve' for more information"

Inspired by: SumoJim
(via #svn IRC channel on Freenode)