scala/scala — pull request #2612 by xeno-by (2013-05-30 17:16:51+00:00)
Title: SI-7533 Adds Symbol.isAbstract

Amazingly enough, we've missed the fact that non-type symbols can also
be abstract. Having been enlightened by this, I'm exposing isDeferred
and merging it along with isAbstractType and isAbstractClass into the
unified Symbol.isAbstract method.