Merge branch 'es/grep-require-name-when-needed' into maint

More parameter validation. * es/grep-require-name-when-needed: grep: fail if call could output and name is null

Junio C Hamano committed Jul 25, 2019 at 14:27 UTC 518e8748979dbe485f519d0f63c3642cc1643f79

No changes.