如何在Windows的VS Code中给文本加下划线？

Question

如何在文本文件中加下划线？我已经尝试了下面的代码段，但无法正常运行。我是VIM的老用户，几天前刚刚从Sublime Text切换到VS Code。我爱它！

"MyUnderine": {
"prefix": "myund",
"body": [
    "\n$TM_SELECTED_TEXT---------------------------------------------$0"
    //"<verbatim>\n\t$TM_SELECTED_TEXT\n</verbatim>$0"
    //"$TM_CURRENT_LINE\n",
    //"-----------------------------------------$0"
],
"description": "Underline text"