问将字符串拆分成不超过26个字符的组，四舍五入到最接近的单词

EN

local function formatUpToX(s)
  local x = 26
  local splitstr = "([ \t]*)(%S*)([ \t]*)(\n?)"
  local t = {""}
  for prefix, word, suffix, newline in s:gmatch(splitstr) do
    if #(t[#t]) + #prefix + #word > x and #t > 0 then
      table.insert(t, word..suffix)
    else
      t[#t] = t[#t]..prefix..word..suffix
    end
    if #newline > 0 then table.insert(t, "") end
  end
  return t
end

local function wrap_string(str, wrap_length)
  local lines = {}

  while #str > 0 do
    local last_space_index

    -- Only check substrings longer than the wrap length
    if #str > wrap_length then
      -- Check for first space so words longer than `wrap_length` don't break.
      last_space_index = str:sub(1, wrap_length):find'%s%S*$' or str:find'%s'
    end

    table.insert(lines, str:sub(1, last_space_index))

    if not last_space_index then break end

    str = str:sub(last_space_index + 1)
  end
  return lines
end