Merge pull request #2084 from astares/22760-RBRefactoryClassChange-sh…

…ould-define-isAbstract-with-true

22760 RBRefactoryClassChange should define #isAbstract with true

src/Refactoring-Changes/RBRefactoryClassChange.class.st

@@ -1,5 +1,5 @@
 "
-I am the baseclass for a ""class change"" refactoring change. I know about the
+I am the abstract baseclass for a ""class change"" refactoring change. I know about the
 class(name) whether it is a change for for the meta or the instance side.
 
 I keep track of the undo and redo operation, but the concrete class change operation is implement by my subclasses.
@@ -14,6 +14,11 @@ Class {
 	#category : #'Refactoring-Changes'
 }
 
+{ #category : #testing }
+RBRefactoryClassChange class >> isAbstract [ 
+	^self name = #RBRefactoryClassChange
+]
+
 { #category : #comparing }
 RBRefactoryClassChange >> = aRefactoryClassChange [ 
 	self class = aRefactoryClassChange class