Merge branch 'sb/submodule-cleanup-export-git-dir-env'

Code cleanup. * sb/submodule-cleanup-export-git-dir-env: submodule.c: use GIT_DIR_ENVIRONMENT consistently

Junio C Hamano committed Jan 18, 2017 at 15:12 UTC 8b5b0e8db593adfd3556fa3faa2aeb5f55e4f8b4

No changes.