I've been using LaTeX for years and never saw this before: if an item (in `enumerate`) starts with an `\hbox`, then the `\hbox` is placed *before* the label!

```
\documentclass[12pt]{article}

\def\Blank#1{\relax{\hbox to 1in{\hrulefill\textsl{#1}\hrulefill}}}

\begin{document}

\section{Example}

Here's a list:
\begin{enumerate}
\item
\Blank{test}, plus stuff after.

\item{}
\Blank{test}, plus stuff after.

\item\relax
\Blank{test}, plus stuff after.

\item{ }
\Blank{test}, plus stuff after.

\item{ }\relax
\hbox to 1in{\hrulefill\textsl{test}\hrulefill}, plus stuff after.

\item{ X }
\Blank{test}, plus stuff after.

% etc.

\end{enumerate}

\end{document}

```

The result is unexpected, except for the last item.
[![shows text coming before labels](https://i.stack.imgur.com/vBaWE.png)](https://i.stack.imgur.com/vBaWE.png)

Blanks, `\relax`, nothing stops the `\hbox` being moved back except actual text.

What am I doing wrong?