improve orphanize and shunt documentation

[btry]

Hi

I think the documentation should emphasize even stronger about the limited effect of orphanize and shunt.

I needed some trial and errors to understand their effect is limited to the next generation of a mock, and only one. If I want to generate a second mock with an orphaned method then I had to call again orphanize.

My misunderstanding was I thought the orphanize worked for all mocks created after the call of orphanize or shunt

[Grummfy]

add the example with generated cless