Move /src/test to /tests

tests/ui/for-loop-while/loop-diverges.rs

@@ -0,0 +1,14 @@
+// run-pass
+#![allow(unused_parens)]
+// pretty-expanded FIXME #23616
+
+/* Make sure a loop{} can be the tailexpr in the body
+of a diverging function */
+
+fn forever() -> ! {
+  loop{}
+}
+
+pub fn main() {
+  if (1 == 2) { forever(); }
+}