[backbone] Fix indentation for dir.js
[backbone] Fix indentation for dir.js

madflow/seahub,Chilledheart/seahub,madflow/seahub,madflow/seahub,miurahr/seahub,madflow/seahub,miurahr/seahub,Chilledheart/seahub,Chilledheart/seahub,Chilledheart/seahub,madflow/seahub,miurahr/seahub,Chilledheart/seahub,miurahr/seahub