This should be changed to: `fr.search([("%%", "",  "")])`

To explain, as _0.9_ has multi-line regex, the seach expects a list of lines, and the recent change from #476 is reason for the list of tuples. The use of `[::2]` basically skips the second element of the tuple, which is the date, leaving the pre-date and post-date part of the line. As you know, all the filter regexs are built on the assumption that the time element of the line is removed.