Added co-moving Sod shock test.

Added a new version of the Sod shock test that runs in a co-moving frame. For gamma = 5/3, the result should still match the analytic expectation, albeit for a re-scaled time value.

The test runs from z=999 to z=960.5, which is a regime of relatively strong expansion.

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• b59061f5 - Made sure co-moving Sod shock is run for the same amount as (re-scaled) time as…

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• 5f05e2df - Added 1D co-moving Sod shock test.

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• 5b4ed1c6 - Added 2D co-moving Sod shock test. Some minor changes to 1D and 3D version scripts.

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Added the 1D and 2D version. Changed the final redshift to z=936.75, so that the output can now be directly compared with the non co-moving version. This introduced #516 (closed). As soon as that is fixed, this test should work fine.

mentioned in issue #516 (closed)

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• d7610199 - Correct calculation of the next snapshot output time even in the cases where the…

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All good and tested.

merged

mentioned in commit f5e92641