tab characters in the source code

[Mark Polesky]

I was fiddling around with output-ps.scm (specifically
the grob-cause procedure on line 159) and was getting
frustrated with the poor indentation displaying in my
editor when I realized that this was being caused by
tab characters in the source. 

Is there an easy way to address this? I don't know how
many tab characters there are in the source, nor do I
know how to find out. But it can be frustrating. Any
solutions?

- Mark