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CSE machine: closures that only a list refers to are drawn beside their frame (#4480)

* CSE machine: draw a closure that only a list refers to beside the frame it was made in

A closure in a list or array whose defining frame has no reference to it had no main
reference (one from its own frame), so it was never positioned and stayed at the
origin of the drawing, with long arrows across the diagram. The adapter now puts such
a closure into its defining frame's heap, as for a closure bound to a name in another
frame, so that frame draws a dummy binding for it (#4479).

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

* Test the array branch of the closure fix too

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

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Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>

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