code: def do_propset(self, subcmd, opts, *args):
          
          print "'svn %s' opts: %s" % (subcmd, opts)
          print "'svn %s' args: %s" % (subcmd, args)
docs: Set PROPNAME to PROPVAL on files, dirs, or revisions.
  
          usage:
              1. propset PROPNAME [PROPVAL | -F VALFILE] PATH...
              2. propset PROPNAME --revprop -r REV [PROPVAL | -F VALFILE] [URL]
          
          1. Creates a versioned, local propchange in working copy.
          2. Creates an unversioned, remote propchange on repos revision.
          
          Note: svn recognizes the following special versioned properties
          but will store any arbitrary properties set:
            svn:ignore     - A newline separated list of file patterns to ignore.
            svn:keywords   - Keywords to be expanded.  Valid keywords are:
              URL, HeadURL             - The URL for the head version of the object.
              Author, LastChangedBy    - The last person to modify the file.
              Date, LastChangedDate    - The date/time the object was last modified.
              Rev, Revision,           - The last revision the object changed.
              LastChangedRevision
              Id                       - A compressed summary of the previous
                                           4 keywords.
            svn:executable - If present, make the file executable. This
              property cannot be set on a directory.  A non-recursive attempt
              will fail, and a recursive attempt will set the property only
              on the file children of the directory.
            svn:eol-style  - One of 'native', 'LF', 'CR', 'CRLF'.
            svn:mime-type  - The mimetype of the file.  Used to determine
              whether to merge the file, and how to serve it from Apache.
              A mimetype beginning with 'text/' (or an absent mimetype) is
              treated as text.  Anything else is treated as binary.
            svn:externals  - A newline separated list of module specifiers,
              each of which consists of a relative directory path, optional
              revision flags, and an URL.  For example
                foo             http://example.com/repos/zig
                foo/bar -r 1234 http://example.com/repos/zag
  
          ${cmd_option_list}