Reinstate suspicious_operation_groupings suppression

This was removed in 6fd1e87de6ef948a19ee5502711517888f66bb60.

url/src/lib.rs

@@ -2084,7 +2084,7 @@ impl Url {
     /// # }
     /// # run().unwrap();
     /// ```
-    #[allow(clippy::result_map_unit_fn)]
+    #[allow(clippy::result_map_unit_fn, clippy::suspicious_operation_groupings)]
     pub fn set_scheme(&mut self, scheme: &str) -> Result<(), ()> {
         let mut parser = Parser::for_setter(String::new());
         let remaining = parser.parse_scheme(parser::Input::new(scheme))?;