Formatting of generic discrete type disagrees with GNAT warning

[pyjarrett]

Noticed in this code snippet, autoformat in VS Code (with GNATformat) results in this:

generic
   type My_Enum is(<>);
package Example is
   My_Values : array (My_Enum) of Boolean;
end Example;

GNATformat removed the space between is and (<>) and building with GNAT then gives a (style) space required warning between is and (<>).

This is also duplicated when running GNATformat directly, like with gnatformat --project my_example.