State explicitely that PYTHONDONTWRITEBYTECODE is equivalent to -B

diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 4b2793ff7df99f4c0cde70867b4705d39f4cddc9..2537c485718afa3e2334c1faac17762711164833 100644 (file)
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -541,7 +541,8 @@ These environment variables influence Python's behavior.
 .. envvar:: PYTHONDONTWRITEBYTECODE
 
    If this is set, Python won't try to write ``.pyc`` or ``.pyo`` files on the
-   import of source modules.
+   import of source modules.  This is equivalent to specifying the :option:`-B`
+   option.
 
    .. versionadded:: 2.6