Add more tests for EmPy template expansion #543

Job	Run time
bootstrap / setup	5s
pytest / setup	5s
pytest / pytest (macos-latest, 3.8)	1m 33s
pytest / pytest (macos-latest, 3.9)	52s
pytest / pytest (macos-latest, 3.10)	48s
pytest / pytest (macos-latest, 3.11)	49s
pytest / pytest (macos-latest, 3.12)	48s
pytest / pytest (ubuntu-latest, 3.8)	1m 43s
pytest / pytest (ubuntu-latest, 3.9)	4m 10s
pytest / pytest (ubuntu-latest, 3.10)	1m 44s
pytest / pytest (ubuntu-latest, 3.11)	1m 58s
pytest / pytest (ubuntu-latest, 3.12)	1m 42s
pytest / pytest (windows-latest, 3.8)	2m 9s
pytest / pytest (windows-latest, 3.9)	2m 13s
pytest / pytest (windows-latest, 3.10)	2m 2s
pytest / pytest (windows-latest, 3.11)	2m 28s
pytest / pytest (windows-latest, 3.12)	2m 11s
pytest / pytest (ubuntu-20.04, 3.6)	1m 7s
bootstrap / bootstrap (macos-latest, 3.8)	1s
bootstrap / bootstrap (macos-latest, 3.9)	1s
bootstrap / bootstrap (macos-latest, 3.10)	1s
bootstrap / bootstrap (macos-latest, 3.11)	1s
bootstrap / bootstrap (macos-latest, 3.12)	1s
bootstrap / bootstrap (ubuntu-latest, 3.8)	1s
bootstrap / bootstrap (ubuntu-latest, 3.9)	1s
bootstrap / bootstrap (ubuntu-latest, 3.10)	54s
bootstrap / bootstrap (ubuntu-latest, 3.11)	49s
bootstrap / bootstrap (ubuntu-latest, 3.12)	58s
bootstrap / bootstrap (windows-latest, 3.8)	1s
bootstrap / bootstrap (windows-latest, 3.9)	1s
bootstrap / bootstrap (windows-latest, 3.10)	1s
bootstrap / bootstrap (windows-latest, 3.11)	1s
bootstrap / bootstrap (windows-latest, 3.12)	1s
bootstrap / bootstrap (ubuntu-20.04, 3.6)	54s
	32m 14s

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