cc/cirrus_work: revision graph

graph

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tweaked formatting
Mon, 04 Dec 2023 10:40:47 +0000, by Henry S. Thompson
excel rewrote, no important changes (?)
Mon, 04 Dec 2023 10:21:30 +0000, by Henry S. Thompson
replace wrong one with right one
Mon, 04 Dec 2023 09:42:39 +0000, by Henry S. Thompson

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