The book was typeset by the authors, so it seems unlikely. K&R style is clearly in evidence in source code from 1973 such as https://github.com/dspinellis/unix

The book was typeset by the authors, so it seems unlikely. K&R style is clearly in evidence in source code from 1973 such as https://github.com/dspinellis/unix-history-repo/blob/Research-V3/sys/ken/main.c https://github.com/dspinellis/unix-history-repo/blob/Researc...