Navigating sage source code
I'm thoroughly confused by the source code. I've downloaded and unpacked all the source code in spkg/standard and spkg/base, but what I get looks totally different from what I see when browsing the code online (http://hg.sagemath.org/sage-main/file...). Can someone please help me make sense of the source code? I just want to be able to navigate through the code that gets executed when some sage commands are invoked.
Thank you.