The code is being open-sourced as MIT-licensed libraries. The libraries mentioned in the article are Brigadier [0], a command parser and dispatcher, and Data Fixer Upper [1], which is used to migrate older chunk data to newer versions of Minecraft.
Apparently more libraries are in the pipeline to be open-sourced alone these two. One possibility is Blaze3D, which is a rewrite of the rendering engine that is planned on being included in Minecraft 1.14.
Also the numbered quotation format is really without indentation. If I recall correctly in restructuredText you can do the same to do quotations correctly, and you could also put in strings instead of numbers, e.g. [<Author><Year>] (might need Sphinx, a library on top of resT, or maybe a bibtex plugin).
Ah, is that the case? I just remember picking up the indentations for references somewhere, and never really got around to finding out whether that was the right way to do things. Looks like I need to change that habit
I knew about the indenting leading to formatting code; I've just been in the habit of indenting references like that, and didn't occur to me that that would break the clickable links. I'll have to keep that in mind in the future.
Apparently more libraries are in the pipeline to be open-sourced alone these two. One possibility is Blaze3D, which is a rewrite of the rendering engine that is planned on being included in Minecraft 1.14.