docs: def pix2ang(nside, ipix, nest=False, lonlat=False):
      """Drop-in replacement for healpy `~healpy.pixelfunc.pix2ang`."""
      lon, lat = healpix_to_lonlat(ipix, nside, order='nested' if nest else 'ring')
      return _lonlat_to_healpy(lon, lat, lonlat=lonlat)