fix lint & coverage

Author: yyx990803

src/parsers/template.js

@@ -146,6 +146,7 @@ function nodeToFragment (node) {
   // bug when using directly cloned template content with touch
   // events and can cause crashes when the nodes are removed from DOM, so we
   // have to treat template elements as string templates. (#2805)
+  /* istanbul ignore if */
   if (isRealTemplate(node)) {
     return stringToFragment(node.innerHTML)
   }

test/unit/specs/directives/public/for/for_spec.js

@@ -996,7 +996,7 @@ describe('v-for', function () {
       el: document.createElement('div'),
       template: '<div v-for="item in items">{{item.name}}</div>',
       data: {
-        items: [Object.freeze({ name:'hi' })]
+        items: [Object.freeze({ name: 'hi' })]
       }
     })
     expect('Frozen v-for objects cannot be automatically tracked').toHaveBeenWarned()