[Refactoring-UI] Error when pushing up method if same one exists in superclass

[JanBliznicenko]

When we try to push up a method while a method with same selector exists in the superclass, the refactoring ends up in an error.

Steps to reproduce:

1. Create a method named 'abc' in any class that has a subclass
2. Create a method named 'abc' in its direct subclass
3. Right click the 'abc' method in the subclass
4. Refactorings
5. (R) Pull up
6. Refactor

=> Instance of RBNegationCondition class did not understand #strategyChoiceClass, in RePullUpMethodDriver

Issue is present in the released Pharo 13 and current build of Pharo 14.

[Ducasse]

Thanks for the report

[Ducasse]

I can reproduce it.