bug #638 sass-loader should not do css minification

Author: wimhendrikx

lib/loaders/sass.js

@@ -41,7 +41,9 @@ module.exports = {
 
         const config = Object.assign({}, {
             // needed by the resolve-url-loader
-            sourceMap: (true === webpackConfig.sassOptions.resolveUrlLoader) || webpackConfig.useSourceMaps
+            sourceMap: (true === webpackConfig.sassOptions.resolveUrlLoader) || webpackConfig.useSourceMaps,
+            // CSS minification is handled with mini-css-extract-plugin
+            outputStyle: 'expanded'
         });
 
         sassLoaders.push({