Remove horizontal line from parrun

The parrun package places a horizontal line between its two blocks of text (fframe and sframe). There’s an example in this answer: How to use the parrun package.

How can I suppress this line? The blank space between the text blocks is sufficient for my purposes.

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In parrun.sty, five internal commands use the \hrule primitive. Patching these commands with the help of the etoolbox package to remove \hrule seems to do the trick.

\documentclass{article}

\usepackage{parrun}
\usepackage{lipsum}
\usepackage{xcolor}

\usepackage{etoolbox}

\makeatletter
\patchcmd{\b@xbalance}{\hrule}{}{}{}
\patchcmd{\v@idb@xbalance}{\hrule}{}{}{}
\patchcmd{\v@idb@xone}{\hrule}{}{}{}
\patchcmd{\v@idb@xtwo}{\hrule}{}{}{}
\patchcmd{\splitb@x}{\hrule}{}{}{}% relevant for the MWE
\makeatother

\begin{document}
\begin{fframe}
\lipsum[1-2]
\end{fframe}
\begin{sframe}
\color{blue}\lipsum[3-4]
\end{sframe}
\Place*
\end{document}


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Thanks. The last \patchcmd is indeed the crucial one. – Daniel Harbour Sep 26 '12 at 14:45