Re: [PATCH] diff: add --ignore-blank-lines option

> OK.  Thanks.
>
> I think the logic would be more like:
>
>  1. Start from xscr, find the first xchp that is !xchp->ignore;
>     if there is none, we are done. There is no more to show.
>
>  2. Remember the xchp as the beginning.
>
>  3. Tangle ->next pointer to find the next xch that is !xch->ignore;
>     if there is none, we are also done.  xdchanges between the
>     beginning you remembered in the step 2. and your current xchp
>     are the only things we want to show.
>
>  4. Measure the distance between the end of xchp and the beginning
>     of xch.
>
>     - If it is larger than max_common, xdchanges between the
>       beginning you remembered in the step 2. and your current xchp
>       are the only things we want to show.  The next iteration will
>       start by skipping the blank-only changes between xchp and xch.
>
>     - If it is short enough, assign xchp = xch and go back to 3. to
>       find more interesting hunks (that is why we remembered the
>       real "beginning" in step 2.).