(info "(texinfo) @format") says: This is an example of text written between a '@format' command and an '@end format' command. As you can see from this example, the '@format' command does not fill the text.
OK, that's great. However it would take five minutes less to figure out if instead you just used the conventional two part: A B C becomes A B C etc. style examples. I.e., show the source code of your example.
