From 72c068db84c81dd235d7c0a9a33e20817c76fd41 Mon Sep 17 00:00:00 2001
From: Matthew Foster Walsh <15671892+mfosterw@users.noreply.github.com>
Date: Mon, 8 Sep 2025 19:38:14 -0600
Subject: [PATCH] Documented -M help option

---
 doc/man/sphinx-build.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/man/sphinx-build.rst b/doc/man/sphinx-build.rst
index 055e3f366cc..0b75ba8b92e 100644
--- a/doc/man/sphinx-build.rst
+++ b/doc/man/sphinx-build.rst
@@ -58,6 +58,9 @@ Options
    *info*
      Build Texinfo files and run them through :program:`makeinfo`.
 
+   *help*
+      Output a list of valid ``make`` targets and exit.
+
    .. note::
 
       The default output directory locations when using *make-mode*