Move /src/test to /tests

tests/ui/lint/rfc-2457-non-ascii-idents/lint-non-ascii-idents.rs

@@ -0,0 +1,12 @@
+#![deny(non_ascii_idents)]
+
+const חלודה: usize = 2; //~ ERROR identifier contains non-ASCII characters
+
+fn coöperation() {} //~ ERROR identifier contains non-ASCII characters
+
+fn main() {
+    let naïveté = 2; //~ ERROR identifier contains non-ASCII characters
+
+    // using the same identifier the second time won't trigger the lint.
+    println!("{}", naïveté);
+}