Changes
Fix broken table.insert call
self._ships_keys[product] = {}
self._ships_keys[product] = {}
for ship, _ in pairs(self._improvements._products[product]) do
for ship, _ in pairs(self._improvements._products[product]) do
table.insert(self._ships_keys[product])
table.insert(self._ships_keys[product], ship)
end
end
table.sort(self._ships_keys[product])
table.sort(self._ships_keys[product])