[vim] Simplify :FZF
[vim] Simplify :FZF

Ruby version can also accept `--expect` option although it's ignored.

pokey/fzf,jebaum/fzf,mjwestcott/fzf,bobpattersonjr/fzf,me-and/fzf,jebaum/fzf,mhartington/fzf,fazibear/fzf,wilywampa/fzf,lululau/fzf,lululau/fzf,brosander/fzf,lululau/fzf,brosander/fzf,stevenqzhang/fzf,fazibear/fzf,hyiltiz/fzf,pokey/fzf,stevenqzhang/fzf,qiemem/fzf,me-and/fzf,mhartington/fzf,wilywampa/fzf,alerque/fzf,noscript/fzf,junegunn/fzf,mhartington/fzf,tomfitzhenry/pkg-fzf,wilywampa/fzf,jebaum/fzf,junegunn/fzf,hudak/fzf,alerque/fzf,mjwestcott/fzf,fazibear/fzf,bobpattersonjr/fzf,NgaNguyenDuy/fzf,infokiller/fzf,gregory-nisbet/fzf,stuha/wbr-zsh,d4ndo/fzf,gregory-nisbet/fzf,stevenqzhang/fzf,janlazo/fzf,janusnic/fzf,hyiltiz/fzf,bobpattersonjr/fzf,janusnic/fzf,noscript/fzf,hyiltiz/fzf,noscript/fzf,infokiller/fzf,mjwestcott/fzf,NgaNguyenDuy/fzf,qiemem/fzf,gregory-nisbet/fzf,janlazo/fzf,infokiller/fzf,brosander/fzf,NgaNguyenDuy/fzf,d4ndo/fzf,janusnic/fzf,tomfitzhenry/pkg-fzf,me-and/fzf,janlazo/fzf,hudak/fzf,qiemem/fzf,hudak/fzf,alerque/fzf,tomfitzhenry/pkg-fzf,d4ndo/fzf,junegunn/fzf,pokey/fzf