Product Version = NetBeans IDE Dev (Build 20151002-3d4c315fd13b)
Operating System = Windows 8 version 6.2 running on amd64
Java; VM; Vendor = 1.8.0_40
Runtime = Java HotSpot(TM) 64-Bit Server VM 25.40-b25

Reproducibility: Happens every time

STEPS:
If you have code like:

/**
 * Javadoc
 */
@Transactional
public void myMethod()

And apply the following hint via Inspect and transform:

@org.springframework.transaction.annotation.Transactional
=> @javax.ejb.TransactionAttribute
;;

ACTUAL:
It duplicates javadoc:
/**
 * Javadoc
 */
/**
 * Javadoc
 */
@TransactionAttribute
public void myMethod()

EXPECTED:
Instead of just changing the annotation:
/**
 * Javadoc
 */
@TransactionAttribute
public void myMethod(