\stackrel: behaviour incompatible to LaTeX

[dominique-unruh]

The command \stackrel is supposed to typeset its first argument in smaller over the second argument. However, in combination with a size change in its first argument, it behaves differently than LaTeX's \stackrel. Namely, the size change escapes the first argument of \stackrel, and if the size change is followed by only one token, it does not affect that token.

(Tested with LaTeXML 0.8.2.)

Example document (expected behavior is that all examples look like the examples marked with "All is OK"):

\documentclass{article}
\begin{document}

\verb|\scriptscriptstyle| escapes the argument of \verb|\stackrel|, but does not apply to $z$:

$  x \stackrel{\scriptscriptstyle z}\leftarrow e$ 

\verb|\scriptscriptstyle| escapes the argument of \verb|\stackrel|:

$  x \stackrel{\scriptscriptstyle zz}\leftarrow e$

\verb|\scriptscriptstyle| not apply to $z$:

$  x \stackrel{{\scriptscriptstyle z}}\leftarrow e$

All is OK:

$  x \stackrel{{\scriptscriptstyle zz}}\leftarrow e$

All is OK:

$  x \stackrel{{\scriptscriptstyle {}z}}\leftarrow e$
\end{document}

[brucemiller]

Hmm, weird that was never noticed (more likely a regression). Anyway, should be good now in the development version. Thanks for the report!

[dginev]

Hmm, weird that was never noticed (more likely a regression).

Should we add a unit test?