Fix "&amp;" in "<pre>" tag with GeShi plugin

[ghost]

This code match and replace "&amp;" to "&" in "<pre>" tag.

http://imgur.com/KpSWx

[nicksavov]

Thanks for coding this, Hors-Sujet!

While we’re transitioning to a new integrated tracker, could you report the issue on our current main tracker at JoomlaCode and cross-reference each with a link to the other? Here’s the process for reporting on the other tracker:
http://docs.joomla.org/Filing_bugs_and_issues

Alternatively, let me know if you’d like me to create it for you and I can go ahead and do that.

Thanks in advance and thanks again for coding this, Hors-Sujet!

[mbabker]

Note for the JCode item or testers: we've dropped the GeSHI plugin from 3.1, so this would apply to 2.5 only at this point.

[phproberto]

Closing this because the patch cannot be applied to the current master. Feel free to open a new issue for 2.5 if the issue is still present there.

Thanks for contributing!