Align all descriptions relative to the longest symbol in a nomenclature

Question

I'm using the nomencl-package for a list of symbols. Line breaks are inserted automatically whenever a description of a symbol is too long. However, if a symbol itself is too long, the indentation of the first and second line of the description is not aligned. The following example shows what I mean:

\documentclass{article}
\usepackage[utf8]{inputenc}

\usepackage{nomencl}
\makenomenclature

\usepackage{etoolbox}
\renewcommand\nomgroup[1]{%
    \item[\bfseries
    \ifstrequal{#1}{A}{A}{}
]}

\begin{document}
\mbox{}

\nomenclature[A]{$a$}{Abc def ghi jkl mno pqr stu vwx yz. 123 456 789 101112 131415 161718 192021}
\nomenclature[A]{$foobar123$}{Abc def ghi jkl mno pqr stu vwx yz. 123 456 789 101112 131415 161718 192021}

\printnomenclature

\end{document}

This is how the rendered output looks like:

Is it possible to automatically indent all descriptions relative to the longest symbol in the list ($foobar123$ in the example)?

Answer 1

I think the easiest way to solve the problem is to set the distance between the symbol and its description manually in the preamble of the document:

\setlength{\nomlabelwidth}{xcm}

(where x is replaced with a suitably chosen value).