From 73597041ad7e6a20c4b1be120261b6cfdc77a55b Mon Sep 17 00:00:00 2001
From: David Froger <david.froger@thrasos.ai>
Date: Wed, 13 Dec 2023 18:55:50 +0100
Subject: [PATCH] Document --enable-incomplete-feature possible values in "mypy
 --help"

Fixes #14452
---
 docs/source/command_line.rst | 2 +-
 mypy/main.py                 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/source/command_line.rst b/docs/source/command_line.rst
index 09836e2ffd20f..c8e0ef3df11fd 100644
--- a/docs/source/command_line.rst
+++ b/docs/source/command_line.rst
@@ -995,7 +995,7 @@ format into the specified directory.
 Enabling incomplete/experimental features
 *****************************************
 
-.. option:: --enable-incomplete-feature FEATURE
+.. option:: --enable-incomplete-feature {PreciseTupleTypes}
 
     Some features may require several mypy releases to implement, for example
     due to their complexity, potential for backwards incompatibility, or
diff --git a/mypy/main.py b/mypy/main.py
index 8a35c20569636..ee090a03d3cf9 100644
--- a/mypy/main.py
+++ b/mypy/main.py
@@ -1010,7 +1010,7 @@ def add_invertible_flag(
     parser.add_argument(
         "--enable-incomplete-feature",
         action="append",
-        metavar="FEATURE",
+        metavar="{" + ",".join(sorted(INCOMPLETE_FEATURES)) + "}",
         help="Enable support of incomplete/experimental features for early preview",
     )
     internals_group.add_argument(