converter/highlight.py not used yet
In Moin 1.x, when a user searches for wiki pages having a given text string, highlight.py is used to highlight the found text strings when the page is viewed.
In moin2, the converter/highlight.py module is present, but not used. BUT: we use whoosh now for highlighting search results, so it is not needed for that purpose. It maybe could be used for other purposes, though.