Redmine

This patch changes the "List of languages supported by Redmine code highlighter" page in the help to be dynamically generated.

Currently, if the Rouge library adds new languages, someone has to manually update a list in the file app/views/help/wiki_syntax/code_highlighting_languages.html.erb. This method takes time and can lead to mistakes.

With this patch applied, the help page will automatically show any new languages that Rouge starts supporting. This means the list will always be up-to-date without needing manual changes.