Adding golang/go to the list. It's interesting to read how an actual language is implemented, also it's fairly well documented (most of the documentation is ext

Adding golang/go to the list. It's interesting to read how an actual language is implemented, also it's fairly well documented (most of the documentation is extracted from the codebase, so all the crucial bits have to be there). There are a few parts of the codebase that were automatically transpiled from C, but the rest is usually very readable.