-O[v], --describe-all-parameters     : describes all the parameters.
                                       v makes this verbose, i.e., it gives
                                       a verbose description of all parameters.

When running the Einstein Toolkit executable with --help, the above command-line option appears. The 19,123 lines of output is terrifying, but could be made less so. For one thing, each element of a parameter array is shown individually, and many arrays have 100 elements. I think the output for arrays should be combined into a single line.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2652/et_executable-o-outputs-about-19-000-lines