// run this shell command from within the dir you want to change. You will need to change the hg line to use which ever version control you are using, or if you're not use version control (naughty!) then leave out the hg letters altogether.
for f in $(find . -name '*.rhtml') ; do c=$(dirname $f)/$(basename $f .rhtml).html.erb ; hg mv $f $c ; done
