Merge pull request #19432 from soonson/patch-1
authorMichael Case <mikecase@google.com>
Mon, 21 May 2018 17:10:03 +0000 (10:10 -0700)
committerGitHub <noreply@github.com>
Mon, 21 May 2018 17:10:03 +0000 (10:10 -0700)
Update groups.md


Trivial merge