What's changed?

Adjusted how negation is handled when simplifying boolean expressions

What's your motivation?

!(o1 == null ? o2 == null : o1.equals(o2)) was being converted to o1 != null ? o1.equals(o2) : o2 == null which is incorrect

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files