Automattic/_s — pull request #117 by kovshenin (2012-12-06 12:12:01+00:00)
Title: Use the section tag for #primary divs across all template files.

I don't see a reason to use `div` for some places and `section` for other places for the same `#primary` block. Is it because sections need titles? Why don't we use `section` everywhere instead? Consistent with search.php and archive.php.