revtex: tags should close on `. `, not ` `

[nschloe]

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revtex's tags are I. II. etc. for regular sections and Appendix A: etc. for appendices. The LaTeXML output misses the dot/colon at the end.

MWE:

\documentclass{revtex4}
\begin{document}
\section{Introduction}
\appendix
\section{Equations}
\end{document}

LaTeX output:

LaTeXML output:

  <section inlist="toc" xml:id="S1">
    <tags>
      <tag>I</tag>
      <tag role="autoref">section I</tag>
      <tag role="refnum">I</tag>
      <tag role="typerefnum">§I</tag>
    </tags>
    <title><tag close=" ">I</tag>Introduction</title>
  </section>
  <appendix inlist="toc" xml:id="A1">
    <tags>
      <tag>Appendix A</tag>
      <tag role="autoref">Appendix A</tag>
      <tag role="refnum">A</tag>
      <tag role="typerefnum">Appendix A</tag>
    </tags>
    <title><tag close=" ">Appendix A</tag>Equations</title>
    <toctitle><tag close=" ">A</tag>Equations</toctitle>
  </appendix>