Merge pull request 'better text for boat reservation' (#349) from staging into main

Reviewed-on: #349

src/model/boatreservation.rs

@@ -126,15 +126,23 @@ WHERE end_date >= CURRENT_DATE ORDER BY end_date
         let board =
             User::all_with_role(db, &Role::find_by_name(db, "Vorstand").await.unwrap()).await;
         for user in board {
+            let date = if boatreservation.start_date == boatreservation.end_date {
+                format!("am {}", boatreservation.start_date)
+            } else {
+                format!(
+                    "von {} bis {}",
+                    boatreservation.start_date, boatreservation.end_date
+                )
+            };
+
             Notification::create(
                     db,
                     &user,
                     &format!(
-                        "{} hat eine neue Bootsreservierung für Boot '{}' angelegt: Von {} bis {} um {} wegen {}",
+                        "{} hat eine neue Bootsreservierung für Boot '{}' {} angelegt. Zeit: {}; Zweck: {}",
                         boatreservation.user_applicant.name,
                        boatreservation.boat.name,
-                        boatreservation.start_date,
+                       date,
-                        boatreservation.end_date,
                         boatreservation.time_desc,
                         boatreservation.usage
                     ),