After enabling tabline on airline, I cannot see the tab index number
the default behavior is to show the buffer number on the current window, I am trying to change the setting g:airline#extensions#tabline#tab_nr_type to 1 in .vimrc
let g:airline#extensions#tabline#tab_nr_type = 1
and it show nothing:
this following is my .vimrc file about airline:
"airline
let g:airline#extensions#ale#enabled = 1
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1
let g:airline_theme='papercolor'
let g:airline#extensions#tabline#show_tab_nr = 1
let g:airline#extensions#tabline#tab_nr_type = 1
let g:airline#extensions#tabline#tabs_label = 't'
let g:airline#extensions#tabline#buffers_label = 'b'

