I have been leaving my script open in VIM in one PuTTY session and then testing it in another session after writing. That way if my changes break something, I still have my undo history.
Is there any way to get persistent undo without upgrading to VIM 7.3?
It looks like you can use
:set hidden
to save it when switching buffers, but saving your undo history after exiting VIM isn't build in until 7.3. Anyone know of a simple workaround?