in two ways:
* It permits an "else" clause. This code is from http://code.djangoproject.com/ticket/4534
* It doesn't push the context while rendering, so context changes can be performed (like the change that cycle makes: putting the current value into the context)
Use this new tag to cycle the row color if the ballot_id has changed, or
if it's a synthetic document.
- Legacy-Id: 380
2bf510f43b