Update cargo dev update_lints command to fix new warning emitted by duplicated_attributes

Author: GuillaumeGomez

clippy_dev/src/update_lints.rs

@@ -689,6 +689,8 @@ fn gen_deprecated_lints_test(lints: &[DeprecatedLint]) -> String {
 fn gen_renamed_lints_test(lints: &[RenamedLint]) -> String {
     let mut seen_lints = HashSet::new();
     let mut res: String = GENERATED_FILE_COMMENT.into();
+
+    res.push_str("#![allow(clippy::duplicated_attributes)]\n");
     for lint in lints {
         if seen_lints.insert(&lint.new_name) {
             writeln!(res, "#![allow({})]", lint.new_name).unwrap();

tests/ui/rename.fixed

@@ -2,6 +2,7 @@
 // Use that command to update this file and do not edit by hand.
 // Manual edits will be overwritten.
 
+#![allow(clippy::duplicated_attributes)]
 #![allow(clippy::almost_complete_range)]
 #![allow(clippy::disallowed_names)]
 #![allow(clippy::blocks_in_conditions)]

tests/ui/rename.rs

@@ -2,6 +2,7 @@
 // Use that command to update this file and do not edit by hand.
 // Manual edits will be overwritten.
 
+#![allow(clippy::duplicated_attributes)]
 #![allow(clippy::almost_complete_range)]
 #![allow(clippy::disallowed_names)]
 #![allow(clippy::blocks_in_conditions)]