Fix hashcode / equals / formatting.

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java

@@ -625,6 +625,7 @@ class CraftMetaItem implements ItemMeta, Repairable {
                 && (this.hasLore() ? that.hasLore() && this.lore.equals(that.lore) : !that.hasLore())
                 && (this.hasAttributes() ? that.hasAttributes() && this.attributes.equals(that.attributes) : !that.hasAttributes())
                 && (this.hasRepairCost() ? that.hasRepairCost() && this.repairCost == that.repairCost : !that.hasRepairCost())
+                && (this.unhandledTags.equals(that.unhandledTags))
                 && (this.hideFlag == that.hideFlag);
     }
 
@@ -651,6 +652,7 @@ class CraftMetaItem implements ItemMeta, Repairable {
         hash = 61 * hash + (hasEnchants() ? this.enchantments.hashCode() : 0);
         hash = 61 * hash + (hasAttributes() ? this.attributes.hashCode() : 0);
         hash = 61 * hash + (hasRepairCost() ? this.repairCost : 0);
+        hash = 61 * hash + unhandledTags.hashCode();
         hash = 61 * hash + hideFlag;
         return hash;
     }