There is only one truth. It is the source.
January 16, 2013
Django's included version of simplejson outputs spaces after commas. This means that JSON fixtures generated using dumpdata have extra spaces in them. If your editor removes trailing spaces when a file is saved, editing a fixture causes a diff much bigger than it should. This makes reading diffs annoying.
This situation can be fixed by installing simplejson >= 2.1.5. Django will use a newer version of simplejson if it can import it.