FUML13 — The fUML spec uses "new" in diagrams and text in a specialized manner that is not defined.

This use of "new" is not defined or explained. It is not used in any of the normative references. Though I can guess what it means, it should be formally defined in for fUML to be a formal document.

If you are using "new" in some sort of Java way, the Java definition needs to be normative, or "new" needs to be defined explicitly.

Fix incorrect notation for unlimited natural values

The issue is referring to the notation new UnlimitedNatural(1) used as the default value for the attribute MultiplicityElement::upper in Figure 7.4 and new UnlimitedNatural(0) used as the default value for the attribute LiteralUnlimitedNatural::value in Figure 7.6. This is, indeed, not standard UML notation. The values should be changed to simply 1 and 0, respectively, in the two diagrams. (Note that the default values are already notated correctly in the class descriptions 7.2.2.2.22 MultiplicityElement and 7.2.2.2.21 LiteralUnlimitedNatural.)