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Changes between Initial Version and Version 4 of Ticket #17135

initial	v4
11	11	The problem is that the `stringfilter` decorator keeps a pointer to the underlying function, and the template engine uses it.
12	12
13		However, the last line only sets `is_safe` on the function returned by the decorator, not on the underlying function. As a consequence, the template ~~filter~~ doesn't know that the filter is safe.
	13	However, the last line only sets `is_safe` on the function returned by the decorator, not on the underlying function. As a consequence, the template engine doesn't know that the filter is safe.