Move /src/test to /tests

tests/ui/rfc-2005-default-binding-mode/for.rs

@@ -0,0 +1,9 @@
+struct Foo {}
+
+pub fn main() {
+    let mut tups = vec![(Foo {}, Foo {})];
+    // The below desugars to &(ref n, mut m).
+    for (n, mut m) in &tups {
+        //~^ ERROR cannot move out of a shared reference
+    }
+}