Merge branch 'jk/grep-e-could-be-extended-beyond-posix' into maint

Tighten a test to avoid mistaking an extended ERE regexp engine as a PRE regexp engine. * jk/grep-e-could-be-extended-beyond-posix: t7810: avoid assumption about invalid regex syntax

Junio C Hamano committed Jan 31, 2017 at 13:32 UTC 14beee0d0de56d56a8a61e442754644e16c5ed1a

No changes.