Update src/python/dxpy/scripts/dx.py

Co-authored-by: Kurt Jensen <kjensen@dnanexus.com>

Author: austinlocke

src/python/dxpy/scripts/dx.py

@@ -4821,7 +4821,7 @@ def positive_number(value):
                                            nargs='+')
 mv_sources_action.completer = DXPathCompleter()
 parser_mv.add_argument('destination', help=fill('Folder into which to move the sources or new pathname (if only one source is provided).  Must be in the same project/container as all source paths.', width_adjustment=-15))
-parser_mv.add_argument('--target-file-relocation', help='Allow symlink target file relocation in external storage while moving a symlink.', default=False)
+parser_mv.add_argument('--target-file-relocation', help='Allow symlink target file relocation in external storage while moving a symlink.', default=False, action='store_true')
 parser_mv.set_defaults(func=mv)
 register_parser(parser_mv, categories='fs')