Revise const-correctness

ORNL-CEES / mfmg

MFMG is an open-source library implementing matrix-free multigrid methods.

https://mfmg.readthedocs.io

BSD 3-Clause "New" or "Revised" License

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Open masterleinad opened 5 years ago

masterleinad commented 5 years ago

We should have a look at const-correctness throughout the code, see e.g. https://github.com/ORNL-CEES/mfmg/pull/211#discussion_r299666898.