message: test(http1): fix non_fmt_panic warning
diff: @@ -490,7 +490,7 @@ mod tests {
  }
  };
  if state == ChunkedState::Body || state == ChunkedState::End {
  - panic!(format!("Was Ok. Expected Err for {:?}", s));
  + panic!("Was Ok. Expected Err for {:?}", s);
  }
  }
  }
  