[docs] [issue12855] linebreak sequences should be better documented

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at haypocalc.com>:


----------
components: +Unicode
versions: +Python 3.2, Python 3.3

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12855>
_______________________________________