Six options for shorter core examples

[kkoreilly]

1. <core-example> and no code formatting in base md
2. '''go and all Go code blocks must be examples
3. '''core and no Go code formatting in base md, but at least monospace
4. '''go #core and use hashtag md extension
5. '''go core and custom md extension that handles the core
6. '''go and some magic thing that checks if it uses parent or something

[kkoreilly]

7. '''Go = example; '''go = not example (capital = exported)

[kkoreilly]

Going with this, as it is the simplest and doesn't require an intricate or difficult system.