Quite a few tests fail in noisy but meaningless ways when the test suite
is run with generaldelta enabled:
./run-tests.py --extra-config-opt=format.generaldelta=1
This reduces the amount of noise introduced by the debugindex command,
the main source of differences. In my environment, when testing with
generaldelta enabled, this change reduces the number of completely
failing tests from 21 to 8.
Many tests didn't change back from subdirectories at the end of the tests ...
and they don't have to. The missing 'cd ..' could always be added when another
test case is added to the test file.
This change do that tests (99.5%) consistently end up in $TESTDIR where they
started, thus making it simpler to extend them or move them around.
These open the changelog and manifest, respectively, directly so you don't
need to specify the path.
The options have been added to debugindex, debugdata and debugrevlog.
The patch also fixes some minor usage-related bugs.
For filelogs, debugindex and debugdata can be called with the file name
directly instead of the path to the revlog. Since in the future filelogs
will no longer be valid revlogs, calling with a path to the revlog is
deprecated for debugdata. For debugindex it is expected to still work,
but I changed them as well for consistency.
