I'll look, though at first blush it looks like an exceedingly complicated way to just simply select beyond line endings and have white space automatically padded when typing in at the (multi) cursor.
It might be great though - I need to try. (and I do recognize that there are many ways to do things)
I have to say Ultra Edit sites this so well (so does Visual Studio and MSSQL Management Studio). Maybe it's a wierd feature want, but I'm not so sure...
You may be onto something.... /s
(I almost went with British Broadcorping Castration...)