MostAwesomeDude/bravo — pull request #384 by JDShu (2011-12-11 21:36:09+00:00)
Title: Guarantee that blocks are destroyed before dig hooks are called.

This fixes incorrect fluid behavior where when you dig away one
block that is adjacent to a spring, the water does not spread
because the automaton does not know that the newly dug area is
now empty.