add nothing text on empty result

src/main.rs

@@ -279,6 +279,9 @@ fn list(
 
     b.push("## Recent\n".into());
 
+    if torrents.is_empty() {
+        b.push("Nothing.\n".into())
+    } else {
         for torrent in torrents {
             let i: TorrentMetaV1Owned = torrent_from_bytes(&torrent.bytes)?;
             b.push(format!(
@@ -297,6 +300,7 @@ fn list(
                 format::files(&i),
             ))
         }
+    }
 
     b.push("## Navigation\n".into());