I've been checking out source codes of some Linux software. For instance, if I were to run cd /usr/bin and type sudo nano libreoffice, I would see the LibreOffice source code.
However most programs are different. For instance sudo nano cmatrix shows a lot of junk with few recognizable strings of text. It does state at the bottom of nano "Converted from Mac format". I'm not sure what that means, and I don't see it every time I see junk like this.
How can I see the source code of a program like this, or can't I?
Note I'm looking in /usr/bin based on this diagram. Also, note that this isn't restricted to nano. I've also tried vi, but I prefer nano.