these just indicate the start of the prompt by convention & if the user
is root or not with `#` & `$` respectively
Change-Id: Id65f5f879b067ee96715b3e7dc63f68c7ad791b8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11868
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
