Map commands in .vimrc
to align Cucumber complient Feature File steps on the space after the keywords:
" Use Tabularize to set shortcute `,as` to align on feature file step keywords
let mapleader=','
nmap <Leader>as :Tab /^\W*[Given\|When\|Then\|And][a-zA-Z]*\zs\W/r0c0l0<CR>
vmap <Leader>as :Tab /^\W*[Given\|When\|Then\|And][a-zA-Z]*\zs\W/r0c0l0<CR>
So this: