Empty markup lines behavior change (maybe regression) in dev (2.21.7) than stable (2.20.0)

[Jean Abou Samra]

> Try engrave this ly code:
>
> \version "2.20.0"
> >
> >/\header {/
> >/title = \markup \column {/
> >/\line { "Minuet" }/
> >/\line { "" }/
> >/\line { "" }/
> >/}/
> >/subtitle = "A study in accent and in the correct timing of half beats"/
> >/}/
> >
>
>
> {s}
>
>
> By lilypond v2.20.0:
> [image: image.png]
>
> By lilypond v2.21.7:
> [image: image.png]
>
> Sometimes a ly code converted from music sheet software (like Finale), and
> their composers prone to typeset casually like this. It's better to
> keep accordance with the original appearance.
Hello,

I cannot reproduce the original behavior where empty strings took space with
a 2.20 install on Ubuntu. What is your operating system?

Regards,
Jean Abou-Samra