#11 Arrow substitutions don't always work

Input:

\* In the middle of a --> list item
\* At the end of a list item -->
\* --> At the begining of a list item
\*\[-->\] Replacing the bullet of a list item

In the middle of a --> sentence
At the end of a sentence -->
\--> At the begining of a sentence

Output:

\begin\{itemize\}
\item In the middle of a $\rightarrow$ list item
\item At the end of a list item -->
\item $\rightarrow$ At the begining of a list item
\item\[-->\] Replacing the bullet of a list item
\end\{itemize\}

In the middle of a $\rightarrow$ sentence
At the end of a sentence -->
\--> At the begining of a sentence

There are only few situations that really allo the use of the arrow substitutions. Would it be possible to make it work in most cases? Or at least when replacing bullets, with *[-->]?

Thanks for wiki2beamer by the way. Very useful tiny language and tool.