Syntax highlighter breaks when return type ends with a number

The syntax highlighter completely stops highlighting when the returntype of a (static) method ends with a digit.

eg.

class Vector2 { }
class Vector { }


class Test {
    Method_Works() : Vector {
        return new Vector();
    }

    Method_Breaks(): Vector2 {
        return new Vector2();
    }
    static Method_Breaks() : Vector2 {
        return new Vector2();   
    }
}

edit: it even breaks in the GitHub highlighter... But the compiler does accept it

Reproduce the issue in the TypeScript syntax highlighter with the provided class and method examples, comparing Vector with Vector2 return types and static methods. Trace the highlighting rule that handles return-type names ending in digits; done means highlighting continues correctly after both Vector2 declarations and their method bodies.