bug where future bounds check is too conservative

src/whisker/route.rs

@@ -63,7 +63,7 @@ impl Route {
     /// Returns `None` if there isn't enough space for the callsign
     #[must_use]
     pub fn push_future(&mut self, ident: Identity) -> Option<()> {
-        let len = ident.callsign().as_bytes().len() + 3;
+        let len = ident.callsign().as_bytes().len() + 2;
         let free_space = self.path.capacity() - self.path.len();
 
         if len > free_space {