I digged a little into the notable from #2530 >>2005834 Anons what is this?
So I completed that tweet's task and run that command. You can see the full output of the commit diff in my attached screenshot.
Turns out, JA worked for a summer at postgresql (that's an open source sql database).
>Miningleaks: How Julian Assange spent a summer coding in PostgreSQL
http://mat.caminos.upm.es/~iht/pased2011/