SpigotMC/Spigot-Server — pull request #74 by ams2990 (2014-01-17 19:07:29+00:00)
Title:  Fire BlockFromTo Events but mark as cancelled those that do not actually flow

Please see [CraftBukkit#1241](https://github.com/Bukkit/CraftBukkit/pull/1241). This allows plugins to differentiate between events which will flow and those which will not.