Changelog v1.12:

- Minecarts with chest found in Mineshafts will now be regenerated (The use of "fill" or "nofill" in you command will decide if the original items inside of them will be respawned or not);

- Minecarts with Command block, Minecarts with TNT, Minecarts with hopper, Minecarts with furnace, Minecarts with chest, and standard Minecarts that were present in a previously regenerated chunk will now return when the "undo" command is issued, along with their contents (Minecarts with chest will maintain their contents, Minecarts with hopper will maintain their contents, Minecarts with Command block will maintain their commands);