Response to review suggestions.

Author: demiankatz

src/ServiceManager.php

@@ -669,7 +669,9 @@ private function getFactory($name)
                 $this->factories[$name] = $factory;
             }
             // PHP 5.6 fails on 'class::method' callables unless we explode them:
-            if (is_string($factory) && strpos($factory, '::') !== false) {
+            if (PHP_MAJOR_VERSION < 7
+                && is_string($factory) && strpos($factory, '::') !== false
+            ) {
                 $factory = explode('::', $factory);
             }
             return $factory;

test/ServiceManagerTest.php

@@ -273,7 +273,7 @@ public static function sampleFactory()
         return new stdClass();
     }
 
-    public function testStaticCallable()
+    public function testFactoryMayBeStaticMethodDescribedByCallableString()
     {
         $config = [
             'factories' => [