Merge remote-tracking branch 'origin/release/0.3.4' into release/0.3.4

Author: gplusmic

docs/build/build.js

@@ -1,4 +1,3 @@
-var webpack = require('webpack')
 'use strict'
 require('./check-versions')()
 

docs/build/webpack.prod.conf.js

@@ -46,7 +46,7 @@ const webpackConfig = merge(baseWebpackConfig, {
       filename: utils.assetsPath('css/[name].[contenthash].css'),
       // Setting the following option to `false` will not extract CSS from codesplit chunks.
       // Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
-      // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`, 
+      // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`,
       // increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
       allChunks: true,
     }),