test-revert: display the list of all generated cases This will help to track all existing cases. (still very simple now)

test-revert: also create a text version of the snapshot The text version is just a list of existing files with their content. We use a small custom script for that. This is going to be very useful for comparing revert results with revert target content.

hg-test-mode: make exit code highlight work again

test-revert: prepare methodical testing of revert cases We introduce a script to generate revert cases and use it to prepare a test repo. See the inline documentation for details.