fix(log): use robust way to create path (#521)

lua/plenary/log.lua

@@ -7,6 +7,8 @@
 -- This library is free software; you can redistribute it and/or modify it
 -- under the terms of the MIT license. See LICENSE for details.
 
+local Path = require "plenary.path"
+
 local p_debug = vim.fn.getenv "DEBUG_PLENARY"
 if p_debug == vim.NIL then
  p_debug = false
@@ -77,10 +79,8 @@ local unpack = unpack or table.unpack
 log.new = function(config, standalone)
  config = vim.tbl_deep_extend("force", default_config, config)
 
- local outfile = vim.F.if_nil(
- config.outfile,
- string.format("%s/%s.log", vim.api.nvim_call_function("stdpath", { "cache" }), config.plugin)
- )
+ local outfile =
+ vim.F.if_nil(config.outfile, Path:new(vim.api.nvim_call_function("stdpath", { "cache" }), config.plugin).filename)
 
  local obj
  if standalone then
@@ -159,7 +159,7 @@ log.new = function(config, standalone)
 
  -- Output to log file
  if config.use_file then
- local outfile_parent_path = require("plenary.path"):new(outfile):parent()
+ local outfile_parent_path = Path:new(outfile):parent()
  if not outfile_parent_path:exists() then
  outfile_parent_path:mkdir { parents = true }
  end

lua/plenary/popup/init.lua

@@ -426,7 +426,7 @@ function popup.create(what, vim_options)
  { noremap = true }
  )
  end
- 
+
  if vim_options.finalize_callback then
  vim_options.finalize_callback(win_id, bufnr)
  end