Punctuation with font Arev in math mode

[finn]

A minor bug. With font Arev, the punctuation is
oblique/slanted/italic in math mode, which is incorrect,
as a comparison with other fonts shows.

\documentclass{article}
\usepackage{arev}
\usepackage{amsmath}
\begin{document}
\begin{Huge}
\begin{gather*}
x, y.\\
\text{$x$, $y$.}
\end{gather*}
\end{Huge}
\end{document}

TeX Live 2017/Debian

I will also send a mail to the maintainer of the package.