-- Add a buffer bar at the top.
vim.api.nvim_set_var('airline#extensions#tabline#enabled', true)

-- Change the formatter for the tab/buffer bar.
-- Here's a full list of the different formatters:
--   - default
--   - jsformatter
--   - unique_tail
--   - unique_tail_improved
vim.api.nvim_set_var('airline#extensions#tabline#formatter',
                     'unique_tail_improved')