> Another desirable feature is the ability to cut and paste snippets into docstrings.  This is essential not just for doctest, but even for untested examples in docstrings.
> Those examples, need to be recognizable to humans as interactive sessions with outputs clearly distinguished from inputs.  When I tried out the new sidebar in prep for a class, it was impossible to include the ps1 prompts in a cut and paste selection.  They had to be manually typed back in.

This is no longer the case.  In a quick followup PR, which has been merged for some time now, we added a context-menu option "Copy with prompts" which results in code samples directly usable for doctests and code samples.