Revert "bt ruby"

This reverts commit d9d2d9a70f02ab889562d21b2de51e98add108ee.
Revert "Revert "bt ruby""

This reverts commit 93d1b3d7d477c155d89f71037837d27c4c005412.
Tuan 4
Merge remote-tracking branch 'origin/master'