The section coding.pdf has their code style guidelines, colloquially known as Cutler Normal Form, CNF for short. I'm conflicted on it. Definitely overly verbose, but you can't argue with the results of the NT team. Such a rigid style guide almost feels like the technical version of a dress code. And there's an idea called "enclothed cognition" which is like, if you wear a business suit to work, it exerts a subconscious influence that results in you taking the work more seriously, focusing your attention, etc: https://en.wikipedia.org/wiki/Enclothed_cognition
It's also important to remember that a ton of things we take for granted now simply didn't exist (source code control was in its infancy, merging was shit, syntax highlighting was minimal at best, compiling took time, etc).
I agree that in general people are influenced by their perception of themselves. For example I always pretend I'm a kernel programmer when hacking on small kernels. This did lend me a lot of patience to debug and figure things out, which I do not have for my work.
