Improving documentation of plot handlers #1385

Job	Run time
runnable	0s
lint / lint	21s
test (3.9, true, true, ubuntu-latest)	2m 36s
test (3.9, true, true, macos-12)	1s
test (3.9, true, false, ubuntu-latest)	2m 42s
test (3.9, true, false, macos-12)	2m 52s
test (3.9, true, false, macos-14)	1s
test (3.9, false, false, ubuntu-latest)	2m 49s
test (3.9, false, false, macos-12)	2m 51s
test (3.9, false, false, macos-14)	2m 54s
test (3.12, true, false, ubuntu-latest)	2m 40s
test (3.12, true, false, macos-12)	2m 53s
test (3.12, true, false, macos-14)	2m 48s
	25m 28s

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