delete & update
Revert "add .gitignore"

This reverts commit db2dc2bb40aac92844fb537701b1ccf0e8ff6c89.
Revert "Revert "add .gitignore""

This reverts commit a79a73008079f234b5482da7c955b56b30e7e980.
Revert "delete & update"

This reverts commit 5057e5fe0ac62ec76b0d0801cf1e20fc8e1eb6ed.
add new2
add new3
update new2
Revert "add new3"

This reverts commit 8d15b81c02a961f8e6c318010d12ae382c2be23c.