updated comment

Former-commit-id: 0c980f6c231bf31339125b08064db638c92e1d01

lib/single-file/vendor/css-tree.js

@@ -24,7 +24,7 @@
 // Project page: https://github.com/csstree/csstree
 
 // The minified code is generated by running the following command:
-//   npm run gen:syntax && browserify -p deumdify --standalone csstree lib/index.js | uglifyjs -o dist/csstree.js
+//   npm run gen:syntax && browserify --standalone csstree lib/index.js | uglifyjs -o dist/csstree.js
 
 this.singlefile.lib.vendor.cssTree = this.singlefile.lib.vendor.cssTree || (() => {