94d07befe7
LinkedList's Cursor: method to get a ref to the cursor's list We're already providing `.back()` & `.front()`, for which we hold onto a reference to the parent list, so why not share it? Useful for when you got `LinkedList` -> `CursorMut` -> `Cursor` and cannot take another ref to the list, even though you should be able to. This seems to be completely safe & sound. The name is, of course, bikesheddable.