Attached is a test TeX-file to test my patch.
\documentclass[ngerman]{article}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\makeatletter
\usepackage{babel}
\makeatother
\begin{document}
\fg{} \frqq \guillemotright >>test<< \flqq{} \guillemotleft \og
\grqq{}{}``test''
\glqq{},,test{}``
,,test'' \dq{}
\frq{}
\flq{}
\grq{}`
\glq{}\quotesinglbase ,
\textquoteleft
\textquoteright '
\end{document}
