RFR: Updated section on Code Conventions.

[mark.reinhold at oracle.com]

2020/6/29 10:45:26 -0700, alex.buckley at oracle.com:
> ...
> 
> I'm not sure if Mark if saying this exactly, but I can see the 
> Informational-means-normative angle serving as a feature, not a bug. An 
> Informational JEP "Java Style Guide for OpenJDK Projects" which is 
> normative for OpenJDK Projects will be taken as normative for ordinary 
> Java programs around the world, but the JEP "wrapper" is a great 
> mechanism for stopping outright misrepresentation and confusion.

Precisely.

- Mark