feat(cli): hide `--indent-json` from help

README.md

@@ -78,8 +78,7 @@ options:
 {cbor,json,msgpack,toml,yaml}, -f {cbor,json,msgpack,toml,yaml},
 --from {cbor,json,msgpack,toml,yaml}
                         input format
-  --json-indent n, --indent-json n
-                        JSON indentation
+  --json-indent n       JSON indentation
   -k, --stringify       turn into strings boolean, date-time, and null keys
                         for JSON and TOML and null values for TOML
   --max-values n        maximum number of values in input data (default

remarshal/main.py

@@ -151,13 +151,18 @@ def _parse_command_line(argv: List[str]) -> argparse.Namespace:  # noqa: C901.
     if not format_from_argv0 or argv0_to == "json":
         parser.add_argument(
             "--json-indent",
-            "--indent-json",
             dest="json_indent",
             metavar="n",
             type=int,
             default=defaults["json_indent"],
             help="JSON indentation",
         )
+        parser.add_argument(
+            "--indent-json",
+            dest="json_indent",
+            type=int,
+            help=argparse.SUPPRESS,
+        )
 
     if not format_from_argv0 or argv0_to in {"json", "toml"}:
         parser.add_argument(