[docs] [issue35514] Docs on reference count detail. enhancement.

[Terry J. Reedy]

Change by Terry J. Reedy <tjreedy at udel.edu>:


----------
nosy: +serhiy.storchaka

______________________________________________
Python tracker <cpython at roundup.psfhosted.org>
<https://bugs.python.org/issue35514>
______________________________________________