This is the revision history for in what section might i look for an explanation of this idiosyncratic use of shift. i know what shift/unshift in <libera.chat:#esolangs>

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6084 in what section might i look for an explanation of this idiosyncratic use of shift. i know what shift/unshift is in general, but I can't rationalize to myself this particular and evidently common use virgilivs <*:##NULL>