Man pages matching name muse_scipost_subtract_sky_simple in section 7:

muse_scipost_subtract_sky_simple.7.en	debian 10 / cpl-plugin-muse-doc
muse_scipost_subtract_sky_simple.7.en	debian 11 / cpl-plugin-muse-doc
muse_scipost_subtract_sky_simple.7.en	debian 12 / cpl-plugin-muse-doc