Merge remote-tracking branch 'origin/2.0' into 2.0

src/Support/Context.php

@@ -42,7 +42,7 @@ class Context extends Fluent
     {
         $results = $this->getArray($key);
 
-        if ($k !== null) {
+        if ($k === null) {
             $results[] = $value;
         } else {
             $results[$k] = $value;