Re: breaks and the no-break control character

[Dave Kemper]

On 5/5/23, G. Branden Robinson <g.branden.robinson@gmail.com> wrote:
> We seem to have an ugly bit of non-orthogonality in this area.
>
> quantity                              register access
>
> extra pre-vertical line spacing               n/a
> vertical (line) spacing                       .v
> extra post-vertical line spacing      .a
> post-vertical line spacing            .pvs

If the manual is to be taken literally, the situation is uglier than
that.  "The 'extra post-vertical line space'... is the maximum value
of all '\x' escapes with a positive argument," but the .a register
only tells you "the most recent (non-negative) extra vertical line
space."  So by my reading,

... \x'0.3' ... \x'0.6' ... \x'0.3' ...

would space down an extra 0.6v, but .a would contain 0.3v.

Is this a real-world problem?  I have no idea.