为什么 \includepdfmerge 会在最后插入一张空白页？

Question

我怎样才能删除插入后的空白页\includepdfmerge？

代码：

\documentclass{article}
\usepackage{pdfpages}
\begin{document}

\includepdfmerge[scale=0.5, delta=10pt 10pt, nup=2x2]{
black.pdf, 1, black.pdf, 1, 
black.pdf, 1, black.pdf, 1,
}

\includepdfmerge[scale=0.5, delta=10pt 10pt, nup=2x2]{
black.pdf, 1, black.pdf, 1,
black.pdf, 1, black.pdf, 1,
}

\end{document} 

输出：

Answer 1

我刚刚发现，删除最后一个页码定义后的最后一个逗号就可以了。

\documentclass{article}
\usepackage{pdfpages}
\begin{document}

\includepdfmerge[scale=0.5, delta=10pt 10pt, nup=2x2]{
black.pdf, 1, black.pdf, 1, 
black.pdf, 1, black.pdf, 1
}

\includepdfmerge[scale=0.5, delta=10pt 10pt, nup=2x2]{
black.pdf, 1, black.pdf, 1,
black.pdf, 1, black.pdf, 1
}

\end{document}