The nightly diff output has been extended so it’s possible to filter and sort by rule id:
- old format (no changes here): https://internal1.languagetool.org/regression-tests//20191209/result_de_20191209.html
- new format: https://internal1.languagetool.org/regression-tests//20191209/result_de_20191209_table.html
The old format will not disappear, both will now be generated each day. In the new format, you can click table column headers to sort by that column and use the filter to show only some elements. The first column contains MOD (modified), ADD (added, i.e. a new match), REM (match removed).
Please note the filtering happens in your browser. So for a day with very many changes, the page might become slow. Let me know if you have ideas for improvements.