kickstart.nvim/lua/kickstart/plugins/indent_line.lua

return {
  { -- Add indentation guides even on blank lines
    'lukas-reineke/indent-blankline.nvim',
    -- Enable `lukas-reineke/indent-blankline.nvim`
    -- See `:help ibl`
    main = 'ibl',
    opts = {
      indent = {
        highlight = { 'IblIndent' },
        char = { '▏' },
      },
    },
  },
}