opus/composer alignment

[Gilles]

Hi.

In the following excerpt, the end of the "composer"
string is not aligned with the "opus" string (which
is a bit farther to the right).
When the short name is used instead, the alignment
is correct.

%-----
\version "2.4.2"
\header {
    title = "title"
    composer = "Joseph Bodin de Boismortier"
%    composer = "Boismortier"
    opus = "Op. XXXVII"
}
\score {
    \relative c'' { e2 }
}
%-----


Best,
Gilles