I've copied `lsst.el` to `~/.emacs`. 
As for the tab, I couldn't find it---at least not with the emacs Ctrl-s <tab> search.  It also appears (to me) that all of them are regular spaces in that line.  I've retyped the blank spaces with multiple spaces, but if you still see the tab, I may ask you to fix it?  ---Thanks in advance.