::fixture-ready::
$ find source backup -maxdepth 2 -type f | sort
backup/app.conf
backup/stale.txt
source/app.conf
source/index.html
::exit-code::0
$ rsync -avhn --delete ./source/ ./backup/
sending incremental file list
deleting stale.txt
app.conf
index.html

sent 101 bytes  received 31 bytes  264.00 bytes/sec
total size is 24  speedup is 0.18 (DRY RUN)
::exit-code::0
$ rsync -avh --delete ./source/ ./backup/
sending incremental file list
deleting stale.txt
app.conf
index.html

sent 209 bytes  received 67 bytes  552.00 bytes/sec
total size is 24  speedup is 0.09
::exit-code::0