http://bugs.python.org/review/24129/diff/14851/Doc/reference/executionmodel.... File Doc/reference/executionmodel.rst (right): http://bugs.python.org/review/24129/diff/14851/Doc/reference/executionmodel.... Doc/reference/executionmodel.rst:148: Free variables follow the normal rules for name resolution, It may be more clear to say: These references follow the normal rules for name resolution with one exception. Unbound local variables are looked up in the global namespace. ... http://bugs.python.org/review/24129/diff/14851/Doc/reference/executionmodel.... Doc/reference/executionmodel.rst:149: while unbound local variables are looked up in the global namespace. If we stick with the current working, I'd suggest starting a new sentence at "while". http://bugs.python.org/review/24129/