short-format incorrectly (?) applies to indefinite articles

[hdeyoung]

I would like to use the short-format property to print an acronym's short form using small caps. Unfortunately, when I use the \iac command, the indefinite article is also included with the format given by short-format.

This seems incorrect to me, especially since the plural endings are not affected by short-format. If it is the intended behavior, how can I avoid having the short-format applied to indefinite articles?

Here is a minimal example.

\documentclass{article}

\usepackage{acro}
\acsetup{use-id-as-short}

\DeclareAcronym{LTS}{
  short-indefinite = an,
  short-format = \scshape\MakeLowercase,
  long = labeled transition system,
}

\begin{document}
\Iac{LTS} is useful.  Here is \iac{LTS} to use.  \Acp{LTS} are interesting.
\end{document}

[cgnieder]

You are right, the articles should not be formatted. This is now fixed.