Merge pull request #1361 from DaxChen/patch-1

Add better support for pug

lib/builder/webpack/vue-loader.config.js

@@ -20,6 +20,10 @@ export default function ({ isClient }) {
       'stylus': styleLoader.call(this, 'stylus', 'stylus-loader'),
       'styl': styleLoader.call(this, 'stylus', 'stylus-loader')
     },
+    template: {
+      // for pug, see https://github.com/vuejs/vue-loader/issues/55
+      doctype: 'html'
+    },
     preserveWhitespace: false,
     extractCSS: extractStyles.call(this)
   }