message: use new format string syntax in some places
diff: @@ -414,11 +414,11 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
  )
  }
  },
  - CreatedCallId(id) => format!("function call with id {}", id),
  - CreatedAlloc(AllocId(id)) => format!("created allocation with id {}", id),
  - FreedAlloc(AllocId(id)) => format!("freed allocation with id {}", id),
  + CreatedCallId(id) => format!("function call with id {id}"),
  + CreatedAlloc(AllocId(id)) => format!("created allocation with id {id}"),
  + FreedAlloc(AllocId(id)) => format!("freed allocation with id {id}"),
  RejectedIsolatedOp(ref op) =>
  - format!("{} was made to return an error due to isolation", op),
  + format!("{op} was made to return an error due to isolation"),
  };
  let (title, diag_level) = match e {
  