Makes sure we can load/save files with arbitrary extensions

4 jobs for hdf5-h5 in 14 minutes and 32 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Build
passed #122645
docker
build_linux_27

00:07:34

passed #122646
docker
build_linux_36

00:07:28

passed #122647
macosx
build_macosx_27

00:14:30

passed #122648
macosx
build_macosx_36

00:14:03