D2k: Sandworms implementation

Using Mailaender's code as basis, this is my implementation of the sandworm behavior. It is still WIP, but you can get an idea of how it looks from the shellmap.
That's the part I don't get - tabs will never look the same in different environments. Spaces, on the other hand never look different. Why use tabs then?

On the other hand, I really don't get what the problem with this is:
http://prntscr.com/59z7cq
This is exactly "one extra tab".