Generated Descriptions have Cruft

[seandenigris]

E.g.:

descriptionFile
	<magritteDescription>
	^ MAToOneRelationDescription new
		reference:
			(MAContainer basicNew
				instVarAt: 1 put: Dictionary new;
				instVarAt: 2 put: MAIdentityAccessor new;
				instVarAt: 3 put: OrderedCollection new;
				yourself);
		classes: Set new;
		yourself

The #reference: and #classes: setup here is unneeded because they were not changed from the default.

Also, there is the related ugly generated argument to #classes: when the collection is not empty:

classes:
	(Set new
		add: RlPDF;
		add: FileReference;
		add: FileLocator;
		yourself)

Which would seem cleaner as: { RlPDF. FileReference. FileLocator }

[seandenigris]

Fix for the first part (i.e. defaults unchanged) is to supply a default that will match that generated:

MARelationDescription>>descriptionReference
	…
		default: MAContainer new;
	…

and

MARelationDescription>>descriptionClasses
	…
		default: Set new;
	…