propertyAt:put: looks bogus

[Ducasse]

Once the property is set we cannot change it :(
The definition of propertyAt:put: looks wrong. at:ifAbsentPut: only change the value when it is not defined!

propertyAt: propName put: propValue
	^ self ensureProperties
		at: propName
		ifAbsentPut: propValue

So we cannot remove the aliases of a class :(

self propertyAt: #deprecatedAliases put: #()
>>> the old value and not #() 

[Ducasse]

Correct definition could be

propertyAt: propName put: propValue
	^ self ensureProperties
		at: propName
		put: propValue

[Ducasse]

We should write some tests on classes!