I think internally replacing tab characters by the corresponding number of space characters is of more use than removing parts of lines, which can easily be done manually anyway. It's more or less like sorting numerically, i.e. 1, 2, ..., 9, 10 instead of 1, 10, 2, ...
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
See: http://sourceforge.net/p/notepad-plus/discussion/331753/thread/0ee373c9/#6ffe
I think internally replacing tab characters by the corresponding number of space characters is of more use than removing parts of lines, which can easily be done manually anyway. It's more or less like sorting numerically, i.e. 1, 2, ..., 9, 10 instead of 1, 10, 2, ...