Improving documentation of plot handlers #1384

Job	Run time
runnable	0s
lint / lint	20s
test (3.9, true, true, ubuntu-latest)	2m 42s
test (3.9, true, true, macos-12)	1s
test (3.9, true, false, ubuntu-latest)	2m 35s
test (3.9, true, false, macos-12)	2m 50s
test (3.9, true, false, macos-14)	1s
test (3.9, false, false, ubuntu-latest)	2m 45s
test (3.9, false, false, macos-12)	2m 33s
test (3.9, false, false, macos-14)	2m 43s
test (3.12, true, false, ubuntu-latest)	2m 45s
test (3.12, true, false, macos-12)	2m 45s
test (3.12, true, false, macos-14)	2m 30s
	24m 30s

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