[docs] [issue10468] Document UnicodeError access functions

[Eli Bendersky]

Eli Bendersky <eliben at gmail.com> added the comment:

>From IRC:

  the PyUnicode*Error_Foo access functions are not documented
  they are in exceptions.c / pyerrors.h

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10468>
_______________________________________