"Recently I had to edit a huge amount of files (239 in total) scattered in a bunch of directories and subdirectories.What I had to do was add the Google Analytics script snippet to a part of a website that was being maintained by a pair of 'your favorite bad adjective here'. So, first I thought of using sed or awk or something like that. But the reality is that I don’t know how to use this tools and don’t have time to start investigating and testing. But wait, I have Emacs! So, the first thing to do is find and list all the files you need to edit..."