yams #288874 add support for arbitrary message on every constraint class [validation pending]

when using BoundaryConstraint, IntervalBoundaryConstraint or RegexpConstraint, this is a fairly common need to specify custom, readable message.

Other constraint types should probably support it for consistency.

Notice cubicweb already allows this for RQL[Vocabulary]Constraint

prioritynormal
typeenhancement
done in0.44.0
load1.000
load left0.000
closed by#7a0a6eb9d440 [constraint] make all constraints accept a 'msg' argument specifying custom failure message
patch[constraint] make all constraints accept a 'msg' argument specifying custom failure message [applied]