Continuous disintegration

[Ludovic Courtès]

Hello comrades,

Recent changes broke something:

  https://ci.guix.gnu.org/eval/842819/dashboard

--8<---------------cut here---------------start------------->8---
In skribilo/output.scm:
    132:0 10 (_ _ _)
    105:8  9 (%out/writer #<<document> (document/Skribilo User Manu?> ?)
    105:8  8 (%out/writer #<<markup> (&html-html/Skribilo User Manu?> ?)
    141:7  7 (_ _ #<<engine> html 7ffff7551d80>)
    105:8  6 (%out/writer #<<markup> (&html-body/Skribilo User Manu?> ?)
    141:7  5 (_ (#<<markup> (&html-document-title/Skribilo User ?> ?) ?)
    105:8  4 (%out/writer #<<markup> (&html-document-title/Skribilo?> ?)
In skribilo/package/slide/html.scm:
   133:10  3 (html-slide-title _ #<<engine> html 7ffff7551d80>)
In skribilo/engine/html.scm:
  1051:14  2 (html-title-authors (#<<container> (author/author30?> ?) ?)
In unknown file:
           1 (string-join (#<<container> (author/author304) 1407?> ?) ?)
In ice-9/boot-9.scm:
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure string-append: Wrong type (expecting string): #<<container> 
(author/author304) 140737188707616>
make[3]: *** [Makefile:721: user.html] Error 1
make[3]: Leaving directory
'/tmp/guix-build-skribilo-0.10.0-git.drv-0/source/doc/user'
--8<---------------cut here---------------end--------------->8---

In other news, CI will soon be triggered as soon as someone pushes to
the repo:

  https://savannah.nongnu.org/support/?110939

Cheers,
Ludo’.