PEAR/ValidDefaultValue: move syntax error to its own file

Author: biinari

src/Standards/PEAR/Tests/Functions/ValidDefaultValueUnitTest.1.inc

@@ -114,6 +114,3 @@ class ConstructorPropertyPromotionMixedWithNormalParams {
         mixed $requiredParam,
     ) {}
 }
-
-// Intentional syntax error. Must be last thing in the file.
-function

src/Standards/PEAR/Tests/Functions/ValidDefaultValueUnitTest.2.inc

@@ -0,0 +1,7 @@
+<?php
+
+// Intentional syntax error.
+// This should be the only test in this file.
+// Testing that the sniff is *not* triggered.
+
+function