xoxys.general/docs/filters/prefix.md

Simple filter to prefix all items from a list. Default prefix will be -- but you can also pass a custom one.

Example

my_list:
  - item1
  - item2

{{ my_list | prefix | join(' ') }}

# result:
# "--item1 --item2"

Or pass a custom prefix:

my_list:
  - item1
  - item2

{{ my_list | prefix(prefix='-') | join(' ') }}

# result:
# "-item1 -item2"