Squiz/NonExecutableCode: minor test tweak

Only use tabs when in the test cases when they serve a specific purpose.

Author: jrfnl

src/Standards/Squiz/Tests/PHP/NonExecutableCodeUnitTest.2.inc

@@ -46,9 +46,9 @@ trait Something {
 }
 
 enum Something {
-	function getReturnType() {
-	    echo 'no error';
-	}
+    function getReturnType() {
+        echo 'no error';
+    }
 }
 
 $a = new class {