The netCDF kitchen sink tools append to the global history element by
separating the inserted strings by a linefeed (\n).
For example:
:history = "Sat Nov 6 15:45:29 2021: ncrename -v xx,x land_mask_Example3.nc\nSat Nov 6 15:45:11 2021: ncrename -v x,xx land_mask_Example3.nc" ;