bpo-29770: remove outdated PYO related info (GH-590) (GH-612)
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 195f63f..08dc311 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -532,8 +532,8 @@
.. envvar:: PYTHONDONTWRITEBYTECODE
- If this is set to a non-empty string, Python won't try to write ``.pyc`` or
- ``.pyo`` files on the import of source modules. This is equivalent to
+ If this is set to a non-empty string, Python won't try to write ``.pyc``
+ files on the import of source modules. This is equivalent to
specifying the :option:`-B` option.