How to remove inserted text in $1?

[rickalex21]

Hello, I'm not sure if I'm going about this the right way by using sn. I would like to
create headings like this:

--[=============== SMALL HEADING =================]
--[============================= LARGE HEADING ==============================]

However, when I am done with my snippet it leaves the inserted text
at the end like this:

-- [============================= Large Heading =============================]Large Heading

If possible I would like to avoid using vimscript to do line manipulation. How can I accomplish this?

-- [============================= Large Heading =============================]
$0

Here is the code:

  s(
    "s",
    sn(1, {
      f(function(args)
        local title = args[1][1]
        local cs = vim.bo.commentstring:gsub("%%s", "")
        -- local pad = math.floor((73 - string.len(title) - 2) / 2)
        local pad = (73 - string.len(title) - 2) / 2
        return cs.."["..string.rep("=", pad ).." "..title.." "..string.rep("=", pad).."]"
      end, { 1 }),
      i(1, "Insert Titile"),
      i(0),
    })
  ),

Thanks

[rickalex21]

I think I'm going about it the wrong way, ideally you want to calculate the pad with f() then I(1,"insert title") then f(), that's how it's done with the 3 line box... At that point no need to delete anything cause you calculate the pad on both sides according
to the insert.