[django/django] f108b1: [1.4.x] Clarified striptags documentation

[GitHub]

Branch: refs/heads/stable/1.4.x
Home: https://github.com/django/django
Commit: f108b1f7d79526fb2fc0a6ff212744cffb399d15
https://github.com/django/django/commit/f108b1f7d79526fb2fc0a6ff212744cffb399d15
Author: Claude Paroz <cla...@2xlibre.net>
Date: 2014-03-22 (Sat, 22 Mar 2014)

Changed paths:
M docs/ref/templates/builtins.txt

Log Message:
-----------
[1.4.x] Clarified striptags documentation

The fact that striptags cannot guarantee to really strip all
non-safe HTML content was not clear enough. Also see:
https://www.djangoproject.com/weblog/2014/mar/22/strip-tags-advisory/

Partial backport (doc-only) of 6ca6c36f82 from master.