Report was for tty, but X11 exhibited the same behavior. With the
perm_invent option enabled, when the permanent inventory window is
displayed, it would be empty if not carrying anything. For tty, that
meant a naked "(end) " selection prompt. Put a separator line of "Not
carrying anything" into the menu so that it won't be completely empty.
The selection prompt is still present but it is attached to something.
(The behavior is different from !perm_invent, where you get that same
text via pline without any menu at all.)
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