RgRaw doesn't work if g:fzf_preview_window is list

[ipwnponies]

Latest version of fzf-vim has updated g:fzf_preview_window from a string to a list. This was to allow adding bind for toggling preview window.

From doc:

" This is the default option:
" - Preview window on the right with 50% width
" - CTRL-/ will toggle preview window.
" - Note that this array is passed as arguments to fzf#vim#with_preview function.
" - To learn more about preview window options, see --preview-window section of man fzf.
let g:fzf_preview_window = ['right:50%', 'ctrl-/']

It seems like s:preview was copied from fzf-vim and needs to be updated, can be pulled from junegunn/fzf.vim@44057cc#diff-f697bec8f1ba94d14196b753546e9fe6a486a33e10f25afb42765573c991fa0fR42

vim-agriculture/autoload/agriculture.vim

Lines 38 to 41 in 1095d90

	function! s:preview(bang, ...)
	let preview_window = get(g:, 'fzf_preview_window', a:bang && &columns >= 80 || &columns >= 120 ? 'right': '')
	if len(preview_window)
	return call('fzf#vim#with_preview', add(copy(a:000), preview_window))

But before we do that, we should consider not vendoring this function altogether. The value it added was conditionally setting g:preview_window = 'right' if the screen was wide enough but it no longer that does in upstream (maybe the logic was moved elsewhere?).