cargo fmt and fix tests

src/discrete_range_map.rs

@@ -17,11 +17,11 @@ You should have received a copy of the GNU Affero General Public License
 along with discrete_range_map. If not, see <https://www.gnu.org/licenses/>.
 */
 
+use alloc::vec::Vec;
 use core::cmp::Ordering;
 use core::fmt::{self, Debug};
 use core::iter::once;
 use core::marker::PhantomData;
-use alloc::vec::Vec;
 
 use btree_monstrousity::btree_map::{
 	IntoIter as BTreeMapIntoIter, SearchBoundCustom,

src/lib.rs

@@ -271,7 +271,7 @@ along with discrete_range_map. If not, see <https://www.gnu.org/licenses/>.
 #![feature(step_trait)]
 #![allow(clippy::tabs_in_doc_comments)]
 #![allow(clippy::needless_return)]
-#![cfg_attr(not(feature = "test"), no_std)]
+#![cfg_attr(not(test), no_std)]
 
 extern crate alloc;