到目前为止,我一直在使用 bash3,并且刚刚获得了最新版本的副本
$ ./bash --version
GNU bash, version 4.1.0(1)-release (i686-pc-linux-gnu)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
$
Run Code Online (Sandbox Code Playgroud)
与版本 3 相比,版本 4 中的主要更改/功能添加是什么?