Adapt ui-tests to the tool_lints

tests/ui/unicode.rs

@@ -1,19 +1,19 @@
+#![feature(tool_lints)]
 
 
-
-#[warn(zero_width_space)]
+#[warn(clippy::zero_width_space)]
 fn zero() {
     print!("Here >​< is a ZWS, and ​another");
     print!("This\u{200B}is\u{200B}fine");
 }
 
-#[warn(unicode_not_nfc)]
+#[warn(clippy::unicode_not_nfc)]
 fn canon() {
     print!("̀àh?");
     print!("a\u{0300}h?"); // also okay
 }
 
-#[warn(non_ascii_literal)]
+#[warn(clippy::non_ascii_literal)]
 fn uni() {
     print!("Üben!");
     print!("\u{DC}ben!"); // this is okay