Fixed some examples in function documentation #3288

Job	Run time
codecheck / codecheck	44m 1s
conda / conda (ubuntu-20.04)	11m 23s
linux / linux (-doc-mpi-)	36m 16s
docker / docker (fedora39)	20m 12s
linux / linux (-mpi-)	52m 29s
docker / docker (rocky8)	23m 53s
linux / linux (-coverage-mpi-)	1h 6m 48s
mac / macports (macos-13)	20m 44s
conda / conda (macos-13)	32m 41s
linux / linux (-debug-)	40m 21s
mac / macports (+allmodules, macos-13)	28m 17s
conda / conda (macos-14)	8m 58s
linux / linux (-debug-mpi-)	44m 20s
linux / linux (-intel-)	46m 38s
mac / macsimple (macos-13)	11m 23s
linux / linux (-pycv-mpi-)	19m 39s
mac / macsimple (macos-14)	5m 1s
linux / linux (-nvhpc-mpi-)	55m 54s
	9h 28m 58s

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