Currently, updating a test that uses ASSERT_EXPLAIN requires several steps. For example what I do is:

1. Find the definition of kDebugAsserts and change it to 'true' temporarily.
2. Run the unit test.
3. Find either `V2` or `V2Compact` in the output; copy it.
4. Paste it into the .cpp
5. Use editor shortcuts to fix the quoting and indentation.

There are some easy ways to improve this:

• Remove the kDebugAsserts flag. Instead, have the macro print whenever the comparison fails. (And not when it succeeds.)
• Have the macro print using only one explain format (the one relevant to that assertion).
• Have the printed output be already string-quoted and ready to copy-paste into the .cpp.

Then the steps would be:

1. Run the unit test.
2. Find the only expected-output message; copy it.
3. Paste it into the .cpp