ipython/ipython — pull request #3205 by minrk (2013-04-21 21:52:51+00:00)
Title: add ignored *args to HasTraits constructor

makes subclassing nicer / easier, avoiding unclear

TypeError: __new__() takes exactly 1 argument (2 given)

discussed [on the list](http://mail.scipy.org/pipermail/ipython-dev/2013-April/011409.html).