Adapt to new rustc version

src/commands/forget.rs

@@ -368,6 +368,6 @@ impl KeepOptions {
             }
         }
 
-        keep.then(|| reason)
+        keep.then_some(reason)
     }
 }

src/commands/prune.rs

@@ -617,7 +617,7 @@ impl Pruner {
         let max_repack = match max_repack {
             LimitOption::Unlimited => u64::MAX,
             LimitOption::Size(size) => size.as_u64(),
-            LimitOption::Percentage(p) => (p * self.stats.total_size().total()),
+            LimitOption::Percentage(p) => p * self.stats.total_size().total(),
         };
 
         self.repack_candidates.sort_unstable_by_key(|rc| rc.0);

src/commands/restore.rs

@@ -472,7 +472,7 @@ impl FileInfos {
         }
 
         // Tell to allocate the size only if the file does NOT exist with matching size
-        Ok(open_file.is_none().then(|| file_pos))
+        Ok(open_file.is_none().then_some(file_pos))
     }
 
     fn to_packs(&self) -> Vec<Id> {

src/commands/tag.rs

@@ -139,5 +139,5 @@ fn modify_sn(
         }
     }
 
-    changed.then(|| sn)
+    changed.then_some(sn)
 }