[Rd] Text differencing code in R?

[Duncan Murdoch]

I've been running the R daily news feeds 
(http://developer.r-project.org/RSSfeeds.html) using some Java code 
called from R to compute and display differences in the NEWS.Rd file 
from day to day.  (The code was taken from 
http://code.google.com/p/google-diff-match-patch/).  Using Java has 
meant that the process is somewhat fragile and hard to debug, and I'd 
like to switch to pure R code (or at least self-contained code in a 
package).

Does anyone know of an R package that provides text differencing and 
display in HTML?

Duncan Murdoch