MemoizedInstanceVariableName cop suggests syntactically invalid instance variable for predicate methods.

[cabello]

Continuation of #5648

Expected behavior

It should not suggest replacing @full_name with @full_name!

Actual behavior

app/models/client.rb:93:5: C: Naming/MemoizedInstanceVariableName: Memoized variable @full_name does not match method name full_name!. Use @full_name! instead.

Rubocop wants me to change the instance variable to @full_name!, which is not valid.

Steps to reproduce the problem

def full_name!
  @full_name ||= 'fetch full name'
end

RuboCop version

0.53.0