fix bash syntax for arrays #2848

Job	Run time
mac / macports (macos-12)	36m 29s
mac / macsimple (macos-12)	7m 55s
mac / macports (macos-14)	23m 13s
mac / macsimple (macos-14)	4m 26s
conda / conda (ubuntu-20.04)	10m 20s
mac / macports (+allmodules, macos-12)	36m 29s
docker / docker (fedora39)	21m 49s
conda / conda (macos-12)	21m 15s
docker / docker (rocky8)	24m 18s
conda / conda (macos-14)	8m 24s
codecheck / codecheck	38m 19s
linux / linux (-doc-mpi-)	37m 39s
linux / linux (-mpi-)	49m 26s
linux / linux (-coverage-mpi-)	58m 21s
linux / linux (-debug-)	30m 2s
linux / linux (-debug-mpi-)	38m 55s
linux / linux (-intel-)	44m 50s
linux / linux (-pycv-mpi-)	17m 51s
	8h 30m 1s

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