Move /src/test to /tests

tests/ui/tuple/add-tuple-within-arguments.rs

@@ -0,0 +1,10 @@
+fn foo(s: &str, a: (i32, i32), s2: &str) {}
+
+fn bar(s: &str, a: (&str,), s2: &str) {}
+
+fn main() {
+    foo("hi", 1, 2, "hi");
+    //~^ ERROR function takes 3 arguments but 4 arguments were supplied
+    bar("hi", "hi", "hi");
+    //~^ ERROR mismatched types
+}