Re: Occur stack

[Juri Linkov]

> For things like an occur or grep buffer, I don't think it is necessary
> to keep the actual contents around.  They can be regenerated from
> scratch fast enough, so just keeping the history and possibly a somewhat
> robust cursor location should be enough.  It becomes trickier with stuff
> like grep-find which may run for a while.  Still, having the command
> history to some depth available conveniently is cheap and useful,
> certainly much cheaper than keeping the buffers.

After editing an occur or grep buffer (e.g. removing unnecessary lines
with `flush-lines' or adding more highlighting with `highlight-regexp')
all such changes will be gone.