jaredgrubb/buildbot — comment on commit a2cad9d58f486a217e9ef36d782e4bd4456b702d
File: master/buildbot/schedulers/triggerable.py line 91
By jaredgrubb:

The result is passed back as a tuple; I figured this would make it easier to be backwards-compatible, in case someone has changed their own Triggerable subclass which continues to just pass back the result only.