View the history of your versions
$ git log
Make sure you have told Git that Beyond Compare is your pal. See "Git for Linux" in the Scooter docs.
Copy and paste the version numbers (the first 6 or 7 digits is enough I think).
$ git difftool 9f41f8f57199eaffd7 03853a83de4d56a2
Red shows important differences. All differences are important unless we or the grammar rules label them otherwise (see 4).