fix: autochdir for custom terminals (#553)

* fix: autochdir for custom terminals

* refactor: use ternary expression

can do it like this when the variable is now assigned outside of this block

Author: ttytm

lua/toggleterm/terminal.lua

@@ -485,7 +485,8 @@ end
 ---@param size number?
 ---@param direction string?
 function Terminal:open(size, direction)
-  self.dir = _get_dir(self.dir)
+  local cwd = fn.getcwd()
+  self.dir = _get_dir(config.autochdir and cwd or self.dir)
   ui.set_origin_window()
   if direction then self:change_direction(direction) end
   if not self.bufnr or not api.nvim_buf_is_valid(self.bufnr) then
@@ -496,10 +497,7 @@ function Terminal:open(size, direction)
     local ok, err = pcall(opener, size, self)
     if not ok and err then return utils.notify(err, "error") end
     ui.switch_buf(self.bufnr)
-    if config.autochdir then
-      local cwd = fn.getcwd()
-      if self.dir ~= cwd then self:change_dir(cwd) end
-    end
+    if config.autochdir and self.dir ~= cwd then self:change_dir(cwd) end
   end
   ui.hl_term(self)
   -- NOTE: it is important that this function is called at this point. i.e. the buffer has been correctly assigned