Fix: Isolate format() scope for insets and panel #2378

Job	Run time
run-if-changes	6s
get-versions	15s
build (3.10, 3.9) / Compare baseline Python 3.10 with MPL 3.9	26m 19s
build (3.10, 3.9) / Test Python 3.10 with MPL 3.9	6m 48s
build (3.11, 3.9) / Compare baseline Python 3.11 with MPL 3.9	26m 26s
build (3.10, 3.10) / Compare baseline Python 3.10 with MPL 3.10	19m 49s
build (3.12, 3.9) / Compare baseline Python 3.12 with MPL 3.9	19m 5s
build (3.12, 3.10) / Compare baseline Python 3.12 with MPL 3.10	19m 29s
build (3.11, 3.10) / Test Python 3.11 with MPL 3.10	6m 52s
build (3.13, 3.9) / Test Python 3.13 with MPL 3.9	6m 53s
build (3.11, 3.9) / Test Python 3.11 with MPL 3.9	6m 35s
build (3.13, 3.10) / Test Python 3.13 with MPL 3.10	7m 22s
build (3.12, 3.10) / Test Python 3.12 with MPL 3.10	5m 29s
build (3.13, 3.10) / Compare baseline Python 3.13 with MPL 3.10	20m 3s
build (3.13, 3.9) / Compare baseline Python 3.13 with MPL 3.9	19m 38s
build (3.12, 3.9) / Test Python 3.12 with MPL 3.9	6m 30s
build (3.11, 3.10) / Compare baseline Python 3.11 with MPL 3.10	13m 58s
build (3.10, 3.10) / Test Python 3.10 with MPL 3.10	7m 7s
build-success	4s
	3h 38m 48s

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