Re: Glissando to nothing example in docs

[Werner LEMBERG]

> [...] to enable the glissando to have more space I added a new
> spacing section around it giving this example:
> 
> 8><8><8><8><8><8><8><8><8><8><8><8><8><8><
> \version "2.25.18"
> \relative c'' {
>   \time 3/4
>   \override Glissando.style = #'zigzag
>   c4 c4
>   \newSpacingSection
>   \override Score.SpacingSpanner.spacing-increment = #1
>   c4*7/8\glissando
>   \hideNotes c,,32 \unHideNotes
>   \newSpacingSection
>   \revert Score.SpacingSpanner.spacing-increment
>   \bar "|"
>   R2.
> }
> 8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><

I don't think that using a new spacing section is the right way to
solve this because such a section could still be compressed
unfavorably in tight situations, AFAIK.  Instead, I would simply give
the glissando line a minimum length (I use an exaggerated value for
demonstration purposes).

```
\relative c'' {
  \time 3/4
  \override Glissando.style = #'zigzag
  c4 c4
  c4*7/8
    \tweak springs-and-rods #ly:spanner::set-spacing-rods
    \tweak minimum-length #10
    \glissando
  \hideNotes c,,32 \unHideNotes
  \bar "|"
  R2.
}
```


    Werner