Allow the use of = as a synonym for ==
(RM-305 from redmine: created on 2012-06-07 by Marc Zinnschlag, , closed on 2012-06-07 by Marc Zinnschlag)
(RM-305 from redmine: created on 2012-06-07 by Marc Zinnschlag, , closed on 2012-06-07 by Marc Zinnschlag)