Many Fixes

Slightly improved the second maze hint.
Fixed creating an empty list not costing an operation.
Fixed renaming save file immediately after creating it.
Fixed renaming a save file that is open externally.
Fixed printing spaces with the drone.
Fixed error logs showing the wrong line sometimes.
Fixed error when returning outside a function.
Fixed assigning to a negative list index.
Fixed op count of various data structure operations.
Fixed freezes with certain large data structures.
Fixed various issues with the "in" operator.
Fixed None not working as a dictionary key.
Fixed using a tuple of lists as a dictionary key.