Fix ui-tests that didn't survive the migration

Author: flip1995

tests/ui/drop_forget_copy.rs

@@ -2,7 +2,7 @@
 
 
 #![warn(clippy::drop_copy, clippy::forget_copy)]
-#![allow(clippy::toplevel_ref_arg, clippy::drclippy::op_ref, clippy::forget_ref, unused_mut)]
+#![allow(clippy::toplevel_ref_arg, clippy::drop_ref, clippy::forget_ref, unused_mut)]
 
 use std::mem::{drop, forget};
 use std::vec::Vec;

tests/ui/drop_forget_ref.rs

@@ -1,7 +1,7 @@
 #![feature(tool_lints)]
 
 
-#![warn(clippy::drclippy::op_ref, clippy::forget_ref)]
+#![warn(clippy::drop_ref, clippy::forget_ref)]
 #![allow(clippy::toplevel_ref_arg, clippy::similar_names, clippy::needless_pass_by_value)]
 
 use std::mem::{drop, forget};

tests/ui/else_if_without_else.rs

@@ -1,6 +1,6 @@
 #![feature(tool_lints)]
 
-#![warn(clippy)]
+#![warn(clippy::all)]
 #![warn(clippy::else_if_without_else)]
 
 fn bla1() -> bool { unimplemented!() }

tests/ui/formatting.rs

@@ -1,7 +1,7 @@
 #![feature(tool_lints)]
 
 
-#![warn(clippy)]
+#![warn(clippy::all)]
 #![allow(unused_variables)]
 #![allow(unused_assignments)]
 #![allow(clippy::if_same_then_else)]