Show pinfo information in ipdb using "?" and "??"

In IPDB, it is now possible to show the information about an object using "?" and "??", in much the same way it can be done when using the IPython prompt:

ipdb> partial?
Init signature: partial(self, /, *args, **kwargs)
Docstring:
partial(func, *args, **keywords) - new function with partial application
of the given arguments and keywords.
File:           ~/.pyenv/versions/3.8.6/lib/python3.8/functools.py
Type:           type
Subclasses:

Previously, "pinfo" or "pinfo2" command had to be used for this purpose.