Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
ef0946409 PR-1091: Fix exit position in entity travel with portals
d12768f75 PR-1090: Remove no longer needed world reference from CraftMerchantCustom
7550f6854 SPIGOT-7115: Support hex color codes in custom merchant inventory titles