escaping backticks not working

[Milian Wolff]

Backticks can't be escaped in both .pl and .php Markdown:

    Text `escaped backtick: \` this should be code` Text

Creates the following output:

    <p>Text <code>escaped backtick: \</code> this should be code` Text</p>

-- 
Milian Wolff
http://milianw.de