Mixing tabs and spaces is a nightmare, unless it is your personal non-open project. If a project is open or shared with anyone you need a simple rule to follow.

Mixing tabs and spaces is a nightmare, unless it is your personal non-open project. If a project is open or shared with anyone you need a simple rule to follow. There shouldn't be another leaf in the decision tree for when to use tabs or spaces. We have enough decisions to make the way it is.