Bug: Repeated chords (via "q") are not rendered when using ly:book-process.

[Lovis B. Suchmann]

\version "2.24.3"

% Repeated chords (via "q") are not rendered when using ly:book-process.

test = { r4 <c' e'> r q | }

\book { \score { \test \layout {} } }

#(ly:book-process (ly:make-book $defaultpaper
#f
(ly:make-score test))
$defaultpaper
$defaultlayout
(string-append (ly:parser-output-name) "-1"))

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