I really hate doing all this junk by hand, so I wrote a sed script to do it for me. Make sure you have a backup first, then run this in your templates directory:
find . -type f -print0 | xargs -0 sed -i 's/{% url \([^" >][^ >]*\)/{% url "\1"/g'
It’ll go through all of your template files and replace this:
{% url something.else foo bar %}
with this
{% url "something.else" foo bar %}
Be careful, I was a little lazy with this, it might break on some constructs. It’s still going to be easier looking for errors in a diff than doing it by hand, though.