Often combined with a compression method, such as gzip or bzip2.

    [...]

    [c]reate a g[z]ipped archive and write it to a [f]ile:

       tar czf target.tar.gz file1 file2 file3

That helpful bracketing notation is going to break down as soon as you actually want to deal with bzip2.

There's no real problem, but I never like it when I'm given an example that seems to be going out of its way to suggest something untrue.