cc/cirrus_work: revision graph

graph

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works with all types, part=1
Wed, 12 Jul 2023 18:48:27 +0100, by Henry S. Thompson
rework completely to refill as much as possible only when necessary,
Mon, 10 Jul 2023 19:52:18 +0100, by Henry S. Thompson
finds multiples
Mon, 10 Jul 2023 18:17:35 +0100, by Henry S. Thompson
little steps
Fri, 07 Jul 2023 19:30:23 +0100, by Henry S. Thompson

less more | rev 57: (0) -30 -10 -4 +4 +10 +30 +100 tip