> You run bk revtool on that file, find the assert and look around to see what has changed before that assert. Hover over a line, it will show you the commit co

> You run bk revtool on that file, find the assert and look around to see what has changed before that assert. Hover over a line, it will show you the commit comments to the file and then the changeset. You find the likely line, double click on it, now you are looking at the changeset. I still have fond memories of the bk revool. I haven't found anything since that's been as intuitive and useful.