[braket] Some commands not working in \Braket{} with SVG output

[matteosecli]

Hi, I've just encountered a problem with the braket package. My MWE is

\documentclass{article}
\usepackage{amsmath}
\usepackage{braket}

\begin{document}
    \begin{equation}
        \Braket{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}}.
    \end{equation}
\end{document}

As in issue 785, things work with latexmlc --verbose --destination=MWE.html MWE.tex but do not with latexmlc --verbose --mathsvg --destination=MWE.html MWE.tex. The error is always the same:

Error:shell:latex LaTeX command 'latex ltxmlimg > ltxmlimg.ltxoutput' failed
    returned code 256 (!= 0): 
    See /tmp/LaTeXMLVPd3er/ltxmlimg.log
    In Post::MathImages[@0x3d8a6d8] ->generateImages
Couldn't find image for 'LaTeXML::Post::MathImages:svg:\beginDISPLAY \lx@Braket@{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}}.\endDISPLAY'

and the log says

! Undefined control sequence.
l.61 \beginDISPLAY \lx
                      @Braket@{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}}.\endD...
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

In the example I've used \Braket{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}} just because it stems from a typical (physical) formula, but the same problem occurs with a simpler \Braket{\mathbf{A}} or \Braket{\vec{A}} (I firstly realized the problem with \mathbf since sometimes I redefine \vec as \mathbf). The same goes with \mathcal{A} and I guess a larger variety of commands like these.

Strangely enough, things work with \Bra{} or \Ket{} alone. For example, if change my MWE into

\documentclass{article}
\usepackage{amsmath}
\usepackage{braket}

\begin{document}
    \begin{equation}
        \Bra{a_{\mathbf{p}}^{\dagger}}\Ket{a_{\mathbf{p}}}.
    \end{equation}
\end{document}

things work as expected both with and without --mathsvg.

[brucemiller]

Sorry for the delay; easy fix, as well. The internal constructors needed an alias so that they revert to the original commands that were used, such as \braket. Thanks for the report!