I would expect that there would be no license granted to a the source code in a separate chapter and therefore copyright law would apply. The GPL "virality" on

I would expect that there would be no license granted to a the source code in a separate chapter and therefore copyright law would apply. The GPL "virality" only applies to code that has been published under the GPL so if you had written the code it wouldn't apply. Now another form of infectiousness would apply to the code, that of copyright itself. Anyone who copied the code would be infringing copyright as would anyone who copied them (although they might have a claim against anyone that told them they could copy it). Almost all proprietary licenses are at least as infectious as the GPL.