Hi Haris,
I actually suspect some of these articles were written by TextMate
users ;). I'm assuming you were looking at articles here: http://
www.tug.org/pracjourn/2007-3/index.html
For LaTeX documents at least, there is the wonderful latexdiff
package, which will effectively do word-by-word comparison and
produce a pdf file for you that shows the differences that have
occurred in the document in a wonderful way, and I think it can be
instructed to skip spaces. But by default all these version control
systems look at lines. Is that so much of a problem however?
http://www.ctan.org/tex-archive/support/latexdiff/
Hope this helps,
Haris Skiadas
Department of Mathematics and Computer Science
Hanover College
Your reply has been very helpful indeed. After all, you were one of the authors who got me started. If I were in Astrophysics I'd start learning Latex already, but molecular biology is a different field. I would either do it for the pleasure of writing the lone reviews for myself or have to impose my set of rules on my co-authors. Neither situation is frequent enough or gives me enough pleasure to make me *want* it enough, I guess.