fix(windows): help_native previewer (closes #1112)

Author: ibhagwan

lua/fzf-lua/defaults.lua

@@ -596,7 +596,7 @@ M.defaults.helptags             = {
   },
   fzf_opts  = {
     ["--no-multi"]  = true,
-    ["--delimiter"] = "[ ]",
+    ["--delimiter"] = string.format("[%s]", utils.nbsp),
     ["--with-nth"]  = "..-2",
     ["--tiebreak"]  = "begin",
   },

lua/fzf-lua/previewer/builtin.lua

@@ -930,7 +930,7 @@ end
 
 function Previewer.help_tags:parse_entry(entry_str)
   local tag = entry_str:match("^[^%s]+")
-  local vimdoc = entry_str:match("[^%s]+$")
+  local vimdoc = entry_str:match(string.format("[^%s]+$", utils.nbsp))
   return {
     htag = tag,
     hregex = ([[\V*%s*]]):format(tag:gsub([[\]], [[\\]])),

lua/fzf-lua/previewer/fzf.lua

@@ -417,7 +417,7 @@ end
 function Previewer.help_tags:cmdline(o)
   o = o or {}
   local act = shell.raw_preview_action_cmd(function(items)
-    local vimdoc = items[1]:match("[^%s]+$")
+    local vimdoc = items[1]:match(string.format("[^%s]+$", utils.nbsp))
     local tag = items[1]:match("^[^%s]+")
     local ext = path.extension(vimdoc)
     local cmd = self.cmd:format(libuv.shellescape(vimdoc))

lua/fzf-lua/providers/helptags.lua

@@ -52,7 +52,7 @@ local fzf_fn = function(cb)
   end)()
 
   local add_tag = function(t, fzf_cb, co)
-    local tag = string.format("%-80s %s %s", hl(t.tag), t.filename, t.filepath)
+    local tag = string.format("%-80s %s%s%s", hl(t.tag), t.filename, utils.nbsp, t.filepath)
     fzf_cb(tag, function()
       coroutine.resume(co)
     end)