bpo-16781: In 'exec' doc, add 'nonlocal' to 'yield' and 'return' (GH-2446)
These 3 statements cannot be used at module scope -- nor in exec with one namespace.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 55dd3f0..e36a169 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -526,7 +526,8 @@
occurs). [#]_ If it is a code object, it is simply executed. In all cases,
the code that's executed is expected to be valid as file input (see the
section "File input" in the Reference Manual). Be aware that the
- :keyword:`return` and :keyword:`yield` statements may not be used outside of
+ :keyword:`nonlocal`, :keyword:`yield`, and :keyword:`return`
+ statements may not be used outside of
function definitions even within the context of code passed to the
:func:`exec` function. The return value is ``None``.