minor #3900 Minor rename of Sandbox test: functions->methods (YSaxon)

This PR was merged into the 3.x branch.

Discussion
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Minor rename of Sandbox test: functions->methods

Commits
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6273264 Minor rename of SandboxTest functions->methods

tests/Extension/SandboxTest.php

@@ -323,7 +323,7 @@ public function testSandboxAllowRangeOperator()
         $this->assertEquals('1', $twig->load('1_range_operator')->render(self::$params), 'Sandbox allow the range operator');
     }
 
-    public function testSandboxAllowFunctionsCaseInsensitive()
+    public function testSandboxAllowMethodsCaseInsensitive()
     {
         foreach (['getfoobar', 'getFoobar', 'getFooBar'] as $name) {
             $twig = $this->getEnvironment(true, [], self::$templates, [], [], ['Twig\Tests\Extension\FooObject' => $name]);