/buy command printed in transaction confirmation book can be altered in case you've aliased /buy to do something else on your server
Default /shop command revised to be more thorough about buying and selling. Delete the "shopCommand" line in your config to get the new default text, if you want it.
Fixes:
Correct missed Container cast (affects only non-chest shops)
Replace reset color char to black to mitigate a spigot json conversion "bug" (SPIGOT-4441)
Try-catch a spigot bug that throws an NPE when attempting to check a custom inventory's location.