in src/main/java/org/apache/sling/provisioning/model/MergeUtility.java [398:404]
public static void mergeComments(final Commentable base, final Commentable additional) {
if ( base.getComment() == null ) {
base.setComment(additional.getComment());
} else if ( additional.getComment() != null ) {
base.setComment(base.getComment() + "\n" + additional.getComment());
}
}