安装 Emmet 也有快速生成文件头的功能啊，而且更强大啊
输入下边加粗的缩写，然后Tab，就OK了啊
http://docs.emmet.io/cheat-sheet/
html:4t
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<htmllang="${lang}">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=${charset}">
<title>Document</title>
</head>
<body>
${child}
</body>
</html>
html:4s
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<htmllang="${lang}">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=${charset}">
<title>Document</title>
</head>
<body>
${child}
</body>
</html>
html:xt
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml"xml:lang="${lang}">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=${charset}"/>
<title></title>
</head>
<body>
${child}
</body>
</html>
html:xs
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml"xml:lang="${lang}">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=${charset}"/>
<title>Document</title>
</head>
<body>
${child}
</body>
</html>
html:xxs
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml"xml:lang="${lang}">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=${charset}"/>
<title>Document</title>
</head>
<body>
${child}
</body>
</html>
html:5
<!doctype html>
<htmllang="${lang}">
<head>
<metacharset="${charset}">
<title>Document</title>
</head>
<body>
${child}
</body>
</html>