Yes, but the article also says that file is generated by a makefile from more than a hundred .c and .h files, and that it's done for ease of distribution and because optimizers do better with a single compilation unit.
It's not like the authors spend a lot of time working on the amalgamation and that's the way the project is developed.
It's not like the authors spend a lot of time working on the amalgamation and that's the way the project is developed.