{formmenu: Choice A; default=Choice B; default=Choice C; Choice D; name=menu; multiple=yes}
Option 1a. Join the items with a new line:
{=join(menu, "\n")}
Option 1b. You can join the items with any characters, like a newline and a dash:
{="\n- " & join(menu, "\n- ")}
Option 2a. Use a repeat to have full control of the output for each item and produce a proper bullet list:
- {item_count=count(menu)}{repeat: for (item, index) in menu}{=item}{if: index < item_count}
- {endif}{endrepeat}
- {item_count=count(menu)}{repeat: for (item, index) in menu}{=item}{if: index < item_count}
- {endif}{endrepeat}
