docs: def do_copy(self, subcmd, opts, *args):
          """Duplicate something in working copy or repository, remembering history.
  
          usage:
              copy SRC DST
          
          SRC and DST can each be either a working copy (WC) path or URL:
            WC  -> WC:   copy and schedule for addition (with history)
            WC  -> URL:  immediately commit a copy of WC to URL
            URL -> WC:   check out URL into WC, schedule for addition
            URL -> URL:  complete server-side copy;  used to branch & tag
  
          ${cmd_option_list}
          """
          print "'svn %s' opts: %s" % (subcmd, opts)
          print "'svn %s' args: %s" % (subcmd, args)