I don't know, but I for one don't really believe in syntax coloring or other tools that try to make any code automatically readable.
As an example, take a look at the ugly regex in Decode LaTeX flying accents. The regex is broken to lines with the /x switch to make it readable, but that still doesn't help. The problem with that regex is that I wrote that way back before support of perl 5.10 was universally available, thus the regex does not use named captures, even though it would really need them. An automatic reformatting tool will not provide you meaningful names for the named captures.