removetags is case-sensitive

[peterh32]

The removetags filter is case-sensitive.

Example:
{{ value|removetags:"a" }}
...will not remove the tag <A href="/foo">.

Instead you must do this:
{{ value|removetags:"a A" }}

I found this rather startling. If it can't be remedied, it should certainly be mentioned in the docs, e.g. on ​http://docs.djangoproject.com/en/1.2/ref/templates/builtins/

[Alex Gaynor]

Interesting, this is one of those places where [X]HTML agnosticism may have us in a bind. Proper XML (and XHTML) are case-sensitive, whereas HTML is not. Accepting this in some form, either the code needs to be changed or this needs to be documented.

[Tim Graham]

(In [14925]) Fixed #14676 - Document that the removetags filter is case-sensitive. Thanks peterh32 for the report and elbarto for the patch.

[Tim Graham]

(In [14926]) [1.2.X] Fixed #14676 - Document that the removetags filter is case-sensitive. Thanks peterh32 for the report and elbarto for the patch.

Backport of r14925 from trunk.