Simplify instances of Option::map_or(true, …) in Clippy sources

clippy_lints/src/methods/clone_on_copy.rs

@@ -30,7 +30,7 @@ pub(super) fn check(
         .type_dependent_def_id(expr.hir_id)
         .and_then(|id| cx.tcx.trait_of_item(id))
         .zip(cx.tcx.lang_items().clone_trait())
-        .map_or(true, |(x, y)| x != y)
+        .is_none_or(|(x, y)| x != y)
     {
         return;
     }

clippy_lints/src/methods/mod.rs

@@ -4531,7 +4531,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods {
                         && method_config.output_type.matches(&sig.decl.output)
                         // in case there is no first arg, since we already have checked the number of arguments
                         // it's should be always true
-                        && first_arg_ty_opt.map_or(true, |first_arg_ty| method_config
+                        && first_arg_ty_opt.is_none_or(|first_arg_ty| method_config
                             .self_kind.matches(cx, self_ty, first_arg_ty)
                             )
                         && fn_header_equals(method_config.fn_header, sig.header)

clippy_lints/src/methods/unnecessary_filter_map.rs

@@ -23,7 +23,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'tcx>, a
     if let hir::ExprKind::Closure(&hir::Closure { body, .. }) = arg.kind {
         let body = cx.tcx.hir().body(body);
         let arg_id = body.params[0].pat.hir_id;
-        let mutates_arg = mutated_variables(body.value, cx).map_or(true, |used_mutably| used_mutably.contains(&arg_id));
+        let mutates_arg = mutated_variables(body.value, cx).is_none_or(|used_mutably| used_mutably.contains(&arg_id));
         let (clone_or_copy_needed, _) = clone_or_copy_needed(cx, body.params[0].pat, body.value);
 
         let (mut found_mapping, mut found_filtering) = check_expression(cx, arg_id, body.value);