Adjust retscope6.d

Author: nordlow

test/fail_compilation/retscope6.d

@@ -173,7 +173,7 @@ T9 testfred()
 /* TEST_OUTPUT:
 ---
 fail_compilation/retscope6.d(10003): Error: scope variable `values` assigned to non-scope parameter `values` calling retscope6.escape
-fail_compilation/retscope6.d(10012): Error: `pure` function `escapePtr` returns parameter `r`, annotate with `return`
+fail_compilation/retscope6.d(10012): Deprecation: `pure` function `escapePtr` returns parameter `r`, annotate with `return`
 ---
 */