Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/vendor/twig/Loader/String.php

@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads a template from a string.
+ *
+ * This loader should only be used for unit testing as it has many limitations
+ * (for instance, the include or extends tag does not make any sense for a string
+ * loader).
+ *
+ * When using this loader with a cache mechanism, you should know that a new cache
+ * key is generated each time a template content "changes" (the cache key being the
+ * source code of the template). If you don't want to see your cache grows out of
+ * control, you need to take care of clearing the old cache file by yourself.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_String implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        return $name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        return $name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        return true;
+    }
+}