Merge branch 'es/check-non-portable-pre-5.10'

Developer support update. * es/check-non-portable-pre-5.10: check-non-portable-shell: support Perl versions older than 5.10

Junio C Hamano committed May 19, 2019 at 16:45 UTC dd5b7dc8ed2d02a693411aaae98f97d42c7a536c

No changes.