file_icon_padding, replace spaces with unicode invisible char

README.md

@@ -447,10 +447,12 @@ require'fzf-lua'.setup {
   -- available colors (terminal):
   --    clear, bold, black, red, green, yellow
   --    blue, magenta, cyan, grey, dark_grey, white
+  -- padding can help kitty term users with
+  -- double-width icon rendering
+  file_icon_padding = '',
   file_icon_colors = {
     ["lua"]   = "blue",
   },
-  file_icon_padding = '',
 }
 ```
 

lua/fzf-lua/config.lua

@@ -442,6 +442,7 @@ M.globals.nvim = {
       },
     },
   }
+M.globals.file_icon_padding = ''
 M.globals.file_icon_colors = {
     ["lua"]       = "blue",
     ["rockspec"]  = "magenta",
@@ -492,7 +493,6 @@ M.globals.file_icon_colors = {
     ["otf"]       = "green",
     ["ttf"]       = "green",
 }
-M.globals.file_icon_padding = ''
 
 function M.normalize_opts(opts, defaults)
   if not opts then opts = {} end

lua/fzf-lua/core.lua

@@ -44,7 +44,7 @@ M.get_devicon = function(file, ext)
     local devicon = config._devicons.get_icon(file, ext)
     if devicon then icon = devicon end
   end
-  return icon..config.globals.file_icon_padding
+  return icon..config.globals.file_icon_padding:gsub(" ", utils.nbsp)
 end
 
 M.preview_window = function(opts)