test: update snapshot due to automatically added trails

Author: ulivz

test/markdown/__snapshots__/snippet.spec.js.snap

@@ -3,14 +3,16 @@
 exports[`snippet import snippet 1`] = `
 <pre><code class="language-js">export default function () {
   // ..
-}</code></pre>
+}
+</code></pre>
 `;
 
 exports[`snippet import snippet with highlight multiple lines 1`] = `
 <div class="highlight-lines">
   <div class="highlighted">&nbsp;</div>
   <div class="highlighted">&nbsp;</div>
   <div class="highlighted">&nbsp;</div>
+  <br>
 </div>export default function () { // .. }
 `;
 
@@ -19,5 +21,6 @@ exports[`snippet import snippet with highlight single line 1`] = `
   <div class="highlighted">&nbsp;</div>
   <br>
   <div class="highlighted">&nbsp;</div>
+  <br>
 </div>export default function () { // .. }
 `;