test

Additional comments and changed variable names in heat equation example #1072

Job	Run time
lint	9s
id_repo	1s
docker-build (oldest, cpu)	33m 29s
docker-build (oldest, hip)	1h 0m 39s
docker-build (latest, cpu)	27m 46s
docker-build (latest, cuda)	48m 41s
docker-build (latest, hip)	56m 13s
clang-tidy-test	5m 41s
test (oldest, cpu-gcc, 17, Debug)	4m 20s
test (oldest, cpu-gcc, 17, Release)	5m 13s
test (oldest, cpu-gcc, 20, Debug)	4m 23s
test (oldest, cpu-gcc, 20, Release)	4m 19s
test (oldest, cpu-clang, 17, Debug)	3m 5s
test (oldest, cpu-clang, 17, Release)	3m 59s
test (oldest, hip, 17, Debug)	11m 33s
test (oldest, hip, 17, Release)	11m 30s
test (oldest, hip, 20, Debug)	12m 55s
test (oldest, hip, 20, Release)	12m 27s
test (latest, cpu-gcc, 17, Debug)	5m 9s
test (latest, cpu-gcc, 17, Release)	5m 3s
test (latest, cpu-gcc, 20, Debug)	5m 24s
test (latest, cpu-gcc, 20, Release)	4m 8s
test (latest, cpu-gcc, 23, Debug)	4m 44s
test (latest, cpu-gcc, 23, Release)	5m 2s
test (latest, cpu-clang, 17, Debug)	3m 13s
test (latest, cpu-clang, 17, Release)	5m 11s
test (latest, cpu-clang, 20, Debug)	3m 37s
test (latest, cpu-clang, 20, Release)	4m 9s
test (latest, cpu-clang, 23, Debug)	4m 34s
test (latest, cpu-clang, 23, Release)	4m 19s
test (latest, cuda, 17, Debug)	11m 22s
test (latest, cuda, 17, Release)	11m 4s
test (latest, hip, 17, Debug)	11m 53s
test (latest, hip, 17, Release)	10m 12s
test (latest, hip, 20, Debug)	13m 34s
test (latest, hip, 20, Release)	12m 50s
test (latest, hip, 23, Debug)	12m 18s
test (latest, hip, 23, Release)	11m 36s
	7h 35m 45s

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