Merge branch 'ak/t4151-ls-files-could-be-empty' into maint

Test fix. * ak/t4151-ls-files-could-be-empty: t4151: make sure argument to 'test -z' is given

Junio C Hamano committed May 26, 2016 at 13:17 UTC e8c7b8cf683bcaecfca21a9dd7c9464c50b4d1dd

No changes.