Add 'rails/' from commit '9d16f641809dd51ced7850d2b93384bba8d84393'

git-subtree-dir: rails
git-subtree-mainline: 9d16f641809dd51ced7850d2b93384bba8d84393
git-subtree-split: 9d16f641809dd51ced7850d2b93384bba8d84393
Revert "Add 'rails/' from commit '9d16f641809dd51ced7850d2b93384bba8d84393'"

This reverts commit 7ab8d512cdf2e43f0458587b1e4b4f88fa508512.
Revert "Revert "Add 'rails/' from commit '9d16f641809dd51ced7850d2b93384bba8d84393'""

This reverts commit a17f0065b08d94eb93e6cdacbaabdd219472676c.