chore: complete lua doc

Author: alex-courtis

lua/nvim-tree/explorer/init.lua

@@ -85,7 +85,7 @@ function Explorer:reload(node, git_status)
   local cwd = node.link_to or node.absolute_path
   local handle = vim.loop.fs_scandir(cwd)
   if not handle then
-    return nil
+    return
   end
 
   local profile = log.profile_start("reload %s", node.absolute_path)
@@ -174,10 +174,10 @@ function Explorer:reload(node, git_status)
   local single_child = node:single_child_directory()
   if config.renderer.group_empty and node.parent and single_child then
     node.group_next = single_child
-    local nodes = self:reload(single_child, git_status)
-    node.nodes = nodes or {}
+    local ns = self:reload(single_child, git_status)
+    node.nodes = ns or {}
     log.profile_end(profile)
-    return nodes
+    return ns
   end
 
   self.sorters:sort(node.nodes)