$ datalad update --merge -s roommate
[INFO] Fetching updates for <Dataset path=/home/adina/repos/datalad-handbook/docs/_build/wdirs/dl-101/DataLad-101> 
[INFO] Applying updates to <Dataset path=/home/adina/repos/datalad-handbook/docs/_build/wdirs/dl-101/DataLad-101> 
update(ok): . (dataset)
