refactor: preslash simple functions

- Add pre-slash to short named functions to improve performance by almost 30%
-  @see https://stackoverflow.com/questions/55419673/php7-adding-a-slash-to-all-standard-php-functions-php-cs-fixer-rule

app/Http/Controllers/ArticleController.php

@@ -26,7 +26,7 @@ class ArticleController extends Controller
     {
         $articles = Article::latest()->paginate(6);
 
-        return view('article.index', ['articles' => $articles]);
+        return \view('article.index', ['articles' => $articles]);
     }
 
     /**
@@ -40,6 +40,6 @@ class ArticleController extends Controller
     {
         $article = Article::with(['user', 'comments'])->findOrFail($id);
 
-        return view('article.show', ['article' => $article]);
+        return \view('article.show', ['article' => $article]);
     }
 }