'svnlook proplist' requires path argument?

'svnlook proplist' documents that its path argument is optional:

$ svn help proplist
proplist (plist, pl): List all properties on files, dirs, or revisions.
usage: 1. proplist [TARGET[@REV]...]
       2. proplist --revprop -r REV [TARGET]
...

However, it's behavior in trunk shows it to be required (and has been
since its last modification in r12605 for issue #2181?):

  cmdline$ svnlook pl svn-test-work/repositories/svnsync_tests-1
  subversion/svnlook/main.c:1926: (apr_err=205001)
  svnlook: Missing repository path argument
  cmdline$ svnlook pl svn-test-work/repositories/svnsync_tests-1 /

The code in subversion/svnlook/main.c doesn't default to a path of "/"
(as I'd expect it to):

static svn_error_t *
subcommand_plist (apr_getopt_t *os, void *baton, apr_pool_t *pool)
{
  struct svnlook_opt_state *opt_state = baton;
  svnlook_ctxt_t *c;
  
  if (!opt_state->revprop && opt_state->arg1 == NULL)
    return svn_error_create
      (SVN_ERR_CL_INSUFFICIENT_ARGS, NULL,
       _("Missing repository path argument"));

  SVN_ERR (get_ctxt_baton (&c, opt_state, pool));
  SVN_ERR (do_plist (c, opt_state->revprop ? NULL : opt_state->arg1,
                     opt_state->verbose, pool));
  return SVN_NO_ERROR;
}

The command-line argument validation which causes this behavior was
added at the beginning of this year:

------------------------------------------------------------------------
r12605 | maxb | 2005-01-05 16:58:15 -0800 (Wed, 05 Jan 2005) | 25 lines
Changed paths:
   M /trunk/subversion/svnlook/main.c
   M /trunk/subversion/tests/clients/cmdline/svnlook_tests.py
   M /trunk/subversion/tests/clients/cmdline/svntest/main.py

Fix issue 2181: Add "svnlook {propget,proplist} --revprop".

Patch by: Oliver Klozoff <stevieoh@fastmail.fm>
(Tweaked by me.)

* subversion/svnlook/main.c
  (subcommand_plist, subcommand_pget):
    Pass NULL for the path argument to do_plist/do_pget
    when --revprop is specified.

  (do_plist, do_pget):
    When the 'path' argument is NULL, switch from svn_fs_node_proplist/
    svn_fs_node_prop to svn_fs_revision_proplist/svn_fs_revision_prop.

* subversion/tests/clients/cmdline/svnlook_tests.py:
  (run_svnlook, expect): New utility functions.
  (test_youngest): Rename to...
  (test_misc): ...this, and make it test a whole lot more.
  (test_list): Added the new tests.

* subversion/tests/clients/cmdline/svntest/main.py
  (run_command_stdin): New. Just like 'run_command',
    except it allows the caller to specify data to be piped into
    the command's stdin.

------------------------------------------------------------------------

I assume that the documentation is correct, and the code needs to be
changed accordingly?

-- 
Daniel Rall