grammer / typo fixes in developer file
authorRobert Treat <xzilla@users.noreply.github.com>
Sat, 27 Oct 2018 14:12:54 +0000 (10:12 -0400)
committerGitHub <noreply@github.com>
Sat, 27 Oct 2018 14:12:54 +0000 (10:12 -0400)

Trivial merge