Added missing unit test file for #878

Author: gsherwood

CodeSniffer/Standards/PSR1/Tests/Files/SideEffectsUnitTest.6.inc

@@ -0,0 +1,9 @@
+<?php
+namespace Bar;
+
+use some\foo\{ClassA, ClassB, ClassC as C};
+use function some\foo\{fn_a, fn_b, fn_c};
+use const some\foo\{ConstA, ConstB, ConstC};
+
+class Bar {
+}