You didn't read the blog.

It's talking about the Ada programming language and that its code was apparently stored not as plaintext but an intermediate representation (IR) that could then be transformed back into code.

So formatting was handled by tooling by the nature of the setup. Developers would each have their own custom settings for "pretty printing" the code.

The author isn't saying don't use code formatters. They're highlighting an unusual approach that the industry at large isn't aware of. Instead of getting rid of arguments about code style via formatters, you can get rid of them by saving code in an IR instead of plaintext.