I20230915-1800
- make sure before creating a change operation that any InfixExpression that has NLS tags has either a Statement or FieldDeclaration ancestor in StringConcatToTextBlockFixCore - add new tests to CleanUpTest15 - fixes #779
- make sure before creating a change operation that any InfixExpression that has NLS tags has either a Statement or FieldDeclaration ancestor in StringConcatToTextBlockFixCore - add new tests to CleanUpTest15 - fixes #779