Problem adding \hline\noalign{\smallskip} to a tabular environment

[bersbersbers]

This is VERY similar to issue #71, but since they involve a slightly different example, different macros (graphicx!), and a different mechanism (no deleted text is shown), I post this as a separate issue.

Again, latexdiffing the attached files leads to the error ! Misplaced \noalign. \hline ->\noalign:

\documentclass{article}
\usepackage{graphicx}
\begin{document}
	\begin{table}
		\begin{tabular}{l}
			X \\
		\end{tabular}
	\end{table}
\end{document}

and

\documentclass{article}
\usepackage{graphicx}
\begin{document}
	\begin{table}
		\begin{tabular}{l}
			X \\
			\hline\noalign{\smallskip}
		\end{tabular}
	\end{table}
\end{document}

a.txt
b.txt