[neovim] Use powershell to handle single-quote escaping

Author: janlazo

plugin/fzf.vim

@@ -493,12 +493,18 @@ function! s:execute(dict, command, use_height, temps) abort
   if has('nvim') && s:is_win
     let s:dict = a:dict
     let s:temps = a:temps
+    let s:powershell = ['powershell', '-NoProfile', '-ExecutionPolicy', 'RemoteSigned', '-Command']
     let fzf = {}
     function! fzf.on_exit(job_id, exit_status, event) dict
+        let temps_old = s:temps.result
+        let s:temps.result = tempname()
+        let ps_utf8_fmt = 'Get-Content -Encoding utf8 %s | Add-Content -Encoding utf8 %s'
+        let ps_utf8 = printf(ps_utf8_fmt, temps_old, s:temps.result)
+        call system(s:powershell + [ps_utf8])
         let lines = s:collect(s:temps)
         call s:callback(s:dict, lines)
     endfunction
-    let cmd = ['cmd', '/C', 'start', '/WAIT', 'cmd', '/C', command]
+    let cmd = ['cmd', '/C', 'start', '/WAIT'] + s:powershell + [command]
     call jobstart(cmd, fzf)
     return []
   endif
@@ -715,7 +721,7 @@ function! s:shortpath()
   let short = pathshorten(fzf#fnamemodify(fzf#getcwd(), ':~:.'))
   let slash = s:is_win ? '\' : '/'
   let path = empty(short) ? '~'.slash : short . (short =~ '/$' ? '' : slash)
-  return (s:is_win && !has('nvim')) ? escape(path, ' \') : path
+  return (s:is_win) ? escape(path, ' \') : path
 endfunction
 
 function! s:cmd(bang, ...) abort
@@ -726,7 +732,7 @@ function! s:cmd(bang, ...) abort
     if s:is_win
         let opts.dir = substitute(opts.dir, '/', '\\', 'g')
     endif
-    let dir = (s:is_win && !has('nvim')) ? escape(opts.dir, ' \') : opts.dir
+    let dir = (s:is_win) ? escape(opts.dir, ' \') : opts.dir
   else
     let dir = s:shortpath()
   endif