Lab

-----------------

Lab
^^^
* Add ``TetralithEnvironment`` for the NSC cluster in Linköping (Jendrik Seipp).
* Automatically group multiple runs into one Slurm task when the number
of runs exceeds the maximum number of Slurm tasks (Jendrik Seipp).
* Add ``time_limit_per_task`` parameter to ``SlurmEnvironment`` (Jendrik Seipp).
* Add ``cpus_per_task`` parameter to ``SlurmEnvironment`` (98, Lucas Galery Käser).
* Catch OverflowError when casting large ints to floats (95, Silvan Sievers).

Downward Lab
^^^^^^^^^^^^
* None.

-----------------

Lab
^^^
* Use long Git revision hashes for revision cache. The short ones differ in length
between Git versions (Jendrik Seipp).
* Run continuous integration tests for Python 3.9 (Jendrik Seipp).

Downward Lab
^^^^^^^^^^^^
* Remove "revision_summary" column from info table (Jendrik Seipp).

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Lab
^^^
* Reports: round values to desired precision before determining colors (Jendrik Seipp).
* Restructure and extend documentation (Jendrik Seipp).
* For developers: run CI tests on Ubuntu 20.04 in addition to 18.04 (Jendrik Seipp).

Downward Lab
^^^^^^^^^^^^
* Allow adding SAS+ files with ``FastDownwardExperiment.add_suite()`` (Jendrik Seipp).

-----------------

Lab
^^^
* Take float precision into account when highlighting table cells (Jendrik Seipp).
* Allow serializing `pathlib.Path` objects into JSON files (Jendrik Seipp).
* For developers: add ``.github/CONTRIBUTING.md`` file (Jendrik Seipp).
* For developers: separate tests for Singularity and FF example experiments from other tests (Jendrik Seipp).
* For developers: skip ``cached_revision`` doctests if ``DOWNWARD_REVISION_CACHE`` variable is not set (Jendrik Seipp).
* For developers: use f-strings in code (Jendrik Seipp).

Downward Lab
^^^^^^^^^^^^
* Print number of tasks above and below separator lines in scatter plots (Jendrik Seipp).
* Ignore tasks for which runs have been filtered out in aggregate reports (Jendrik Seipp).
* Fix order of bracketed task counts per domain in table reports (Jendrik Seipp).
* Gracefully handle empty scatter plots (Jendrik Seipp).
* Make ``score_*`` attributes absolute, i.e., include tasks for which not all algorithms
have a value in aggregations (Jendrik Seipp).

-----------------

Lab
^^^
* Bump minimum Python version to 3.6.
* Move ``CachedRevision`` from ``downward`` to ``lab`` package (Thomas Keller).
Please note that the interface to the class is experimental and may change
in the future. Feedback is welcome!
* Let tests fail if any example experiment produces unexplained errors.

Downward Lab
^^^^^^^^^^^^
* No changes.

-----------------

Lab
^^^
* Sort numbers with suffixes (5K, 2M, 8G) and "infinity" correctly in tables.
* Gracefully handle missing "info" or "summary" tables in HTML reports.
* Abort if a function is passed to a ``filter_*`` kwarg.
* Abort if a filter checks missing attribute names
(e.g., when passing ``filter_algorithms`` instead of ``filter_algorithm``).

Downward Lab
^^^^^^^^^^^^
* Add example experiment for running Singularity planner images.