Move all our tests back to ui tests

tests/ui/unicode.rs

@@ -0,0 +1,26 @@
+#![feature(plugin)]
+#![plugin(clippy)]
+
+#[warn(zero_width_space)]
+fn zero() {
+    print!("Here >​< is a ZWS, and ​another");
+    print!("This\u{200B}is\u{200B}fine");
+}
+
+#[warn(unicode_not_nfc)]
+fn canon() {
+    print!("̀àh?");
+    print!("a\u{0300}h?"); // also okay
+}
+
+#[warn(non_ascii_literal)]
+fn uni() {
+    print!("Üben!");
+    print!("\u{DC}ben!"); // this is okay
+}
+
+fn main() {
+    zero();
+    uni();
+    canon();
+}