filter arguments with spaces break several template tags

[Rob Hudson <treborhudson@…>]

After [6956], something like this now breaks:

{% regroup object_list by created|date:"F Y" as grouped %}

I believe it now splits the quoted bits and the arg count is more than 6 in this case, so the templatetag errors out.

[Rob Hudson <treborhudson@…>]

A test case for regroup with filters containing a space

[Gary Wilson]

The bigger problem here is that many of the template tags do not accept filtered arguments passed an argument with a space because they are simply doing token.contents.split().

Here is a patch that seems to fix things for regroup, ifchanged, and with. firstof, if, and ifequal/ifnotequal need some more (involved) work. I changed smart_split_re to allow text before and after the quote characters. Not sure if we want smart_split() to basically only be for parsing template tags, but it seems to be the only place it's used currently.

[Chris Beaven]

A rewrite of smart_split generator to properly handle quoted phrases like we need