1.菜单栏中点击Preferences（首选项）->Setting-User
2. 添加如下三行代码:
// The number of spaces a tab is considered equal to
"tab_size": 2,
// Set true to insert spaces when tab is pressed
"translate_tabs_to_spaces": true,
//设置保存时自动转换
"expand_tabs_on_save": true
3. 如下图，保存退出即可:
