test-rebase-abort: add test from
issue4009
The fix for
issue4009, namely
fe78eb7bcca0, introduced
issue4661.
Let's make sure that the fix for
issue4661 will not reintroduce
issue4009.
run-test.py: greatly increase the priority of 'check-code' tests
As check-code is actually quite long to run for its file size, this prevent them
to be scheduled too late during the test run.
This reduces my typical test run from 107 seconds to 90 seconds