Merge pull request #12705 from berak:imread_document_grayscale
authorAlexander Alekhin <alexander.a.alekhin@gmail.com>
Sun, 30 Sep 2018 20:59:48 +0000 (23:59 +0300)
committerGitHub <noreply@github.com>
Sun, 30 Sep 2018 20:59:48 +0000 (23:59 +0300)

Trivial merge