bug#6205: 23.1; align.el error deleting a lot of whitespace

[Kevin Ryde]

John Wiegley <jwiegley@gmail.com> writes:
>
> Just be really careful with this change.  align.el is extremely
> sensitive to cursor positions.  If it gets enough testing, I'm fine
> with it.

I see vhdl-align-region-groups holds a point-marker for the end of the
previous group of lines becoming the beginning of the next group.  But
I'm hopelessly confused about which bit of which of align and vhdl came
first or got updated.  :-)