rails/rails — pull request #14588 by matthewd (2014-04-03 18:08:13+00:00)
Title: Explicitly load Kernel#y when starting a console

Previously, we relied on the IRB-detection in Psych itself. But that
doesn't work when we're running under spring: the application boots (and
thus psych is required) before we switch to console mode and load IRB.

I can't see any test to do with `pp`, so I followed that precedent. :wink:

Fixes #14587.