[tex4ht] [bug #368] Tabularx package makes \\[...] to produce faulty code inside array

[Jarno Parviainen]

URL:
  <http://puszcza.gnu.org.ua/bugs/?368>

                 Summary: Tabularx package makes \\[...] to produce faulty
code inside array
                 Project: tex4ht
            Submitted by: jarno_c137
            Submitted on: Sat 09 Sep 2017 01:16:30 AM EEST
                Category: None
                Priority: 5 - Normal
                Severity: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

mwe.tex:
---
\documentclass{article}

\usepackage{tabularx}%If this is commented out then everything works as
expected

\begin{document}
\[\begin{array}{c}
abc \\[1ex]
def
\end{array}\]
\end{document}
---

mwe.cfg:
---
\Preamble{xhtml,mathml-,html5}
\begin{document}
\EndPreamble
---

Compilation with:

$ make4ht -u -c mwe.cfg mwe.tex

---

What works: The example above works as expected if tabularx package is not
loaded. The line change inside array produces html that looks like this:

<mtr class="vspace" style="font-size:4.30554pt"><mtd></mtd></mtr>


The problem: When tabularx is loaded the line produced by line change inside
array produces to this:

<tr class="vspace" style="font-size:4.30554pt"><td> </td></tr>

The mtr and mtd tags have changed to tr and td which are not a valid mathml
tags. It produces error when rendered with MahtJax.





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