There are multiple recent help repo commits like
<https://git.libreoffice.org/help/+/98f3d703be6e588c27a94e6ae41d5e4ce74cebbe%5E%21/>
"Remove xmlsec screenshots (not used)" that remove lots of
helpcontent2/source/media/screenshots/ png files. But at least my local
--with-help=html build now fails with
/usr/bin/cp: cannot stat
'/home/sberg/lo/core/helpcontent2/source/media/screenshots/modules/smath/ui/alignmentdialog/AlignmentDialog.png':
No such file or directory
make[1]: *** [/home/sberg/lo/core/solenv/gbuild/Package.mk:35:
/home/sberg/lo/core/instdir/help/media/screenshots/modules/smath/ui/alignmentdialog/AlignmentDialog.png]
Error 1
etc.
