https://bugzilla.redhat.com/show_bug.cgi?id=1219288
--- Comment #13 from Miroslav Suchý msuchy@redhat.com --- (In reply to Julien Enselme from comment #12)
I don't think they were design to state anything else. If I look at the milestone on github: https://github.com/marshmallow-code/marshmallow/milestones I think this confirms that the b stands for beta.
This is fair argument.
Updated: SRPM: http://miroslav.suchy.cz/fedora/python-marshmallow-2.0.0-0.5.a8b3385.fc22.sr... SPEC: http://miroslav.suchy.cz/fedora/python-marshmallow.spec