Allow buggy clippy lint on a per-crate basis

The previous method of allowing it through .cargo/config.toml doesn't
seem to work anymore.

.cargo/config.toml

@@ -44,8 +44,6 @@ rustflags = [
     "-Wclippy::unreadable_literal",
     "-Wclippy::unseparated_literal_suffix",
     "-Wclippy::wildcard_imports",
-    # https://github.com/rust-lang/rust-clippy/issues/8875
-    "-Aclippy::derive_partial_eq_without_eq",
 ]
 
 # activate the target-applies-to-host feature.

crates/ruma-client-api/src/lib.rs

@@ -6,6 +6,8 @@
 //! [client-api]: https://spec.matrix.org/v1.2/client-server-api/
 
 #![warn(missing_docs)]
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 pub mod account;

crates/ruma-common/src/lib.rs

@@ -4,6 +4,8 @@
 
 #![recursion_limit = "1024"]
 #![warn(missing_docs)]
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 #[cfg(not(all(feature = "client", feature = "server")))]

crates/ruma-common/tests/serde/empty_strings.rs

@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
+
 mod string {
     use serde::{Deserialize, Serialize};
     use serde_json::{from_value as from_json_value, json, to_value as to_json_value};

crates/ruma-common/tests/serde/enum_derive.rs

@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
+
 use ruma_common::serde::StringEnum;
 use serde_json::{from_value as from_json_value, json, to_value as to_json_value};
 

crates/ruma-common/tests/serde/url_deserialize.rs

@@ -1,3 +1,6 @@
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
+
 use assert_matches::assert_matches;
 use form_urlencoded::Serializer as Encoder;
 use ruma_common::serde::urlencoded;

crates/ruma-macros/src/lib.rs

@@ -5,6 +5,8 @@
 //! See the documentation for the individual macros for usage details.
 
 #![warn(missing_docs)]
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
 
 use identifiers::expand_id_zst;
 use proc_macro::TokenStream;

xtask/src/main.rs

@@ -4,6 +4,8 @@
 //! `.cargo/config`. Run commands as `cargo xtask [command]`.
 
 #![allow(clippy::exhaustive_structs)]
+// https://github.com/rust-lang/rust-clippy/issues/8875
+#![allow(clippy::derive_partial_eq_without_eq)]
 
 use std::path::PathBuf;