Clarify :option: description.
diff --git a/Doc/documenting/markup.rst b/Doc/documenting/markup.rst
index 25d1457..34c3fe5 100644
--- a/Doc/documenting/markup.rst
+++ b/Doc/documenting/markup.rst
@@ -502,8 +502,9 @@
.. describe:: option
- A command-line option to an executable program. The leading hyphen(s) must
- be included. If a matching ``cmdoption`` directive exists, it is linked to.
+ A command-line option of Python. The leading hyphen(s) must be included.
+ If a matching ``cmdoption`` directive exists, it is linked to. For options
+ of other programs or scripts, use simple ````code```` markup.
.. describe:: program