Upstream: ipython/ipython#11139

This is required for correct interact support of Cython functions, see #24994. The doctest added here is also meant to test a problem discovered on #24994.

Upstream: Fixed upstream, but not in a stable release.

CC: @fchapoton

Component: packages: standard

Author: Jeroen Demeyer

Branch/Commit: 2e75d4c

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/25373