Clean up identity conversions
diff --git a/src/token.rs b/src/token.rs
index 8e253d3..97f33f1 100644
--- a/src/token.rs
+++ b/src/token.rs
@@ -882,7 +882,7 @@
         };
         let mut inner = TokenStream::empty();
         f(&mut inner);
-        let mut g = Group::new(delim, inner.into());
+        let mut g = Group::new(delim, inner);
         g.set_span(*span);
         tokens.append(g);
     }