I disagree as that doesn’t introduce using the B environment with a Hello, world program which is the whole point. After K&R it was the canonical first program.
Pulling my copy of K&R from the shelf, it introduces the hello world program with
The first program to write is the same for all languages: Print the words hello, world
Pulling my copy of K&R from the shelf, it introduces the hello world program with
Suggesting that this was already an established tradition when the book was written in 1978