[docs] [issue15355] generator.__next__() docs should mention exception if already executing

Chris Jerdonek <chris.jerdonek@gmail.com> added the comment: This is a very simple patch. ---------- keywords: +patch Added file: http://bugs.python.org/file26525/issue-15355-1.patch _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue15355> _______________________________________