…correctly consider 2 files equal when their content is not

…o error if header values differ

…ength of the header columns are still compared, ci-run-all-diff

…mber to easily identify which columns differ, various clean up

…n pbl use case to test expected failure, ci-run-diff

…when running diff script directly

…oncurrent runs do not use the same logger instance

…that was used to create a new environment to free up space

… diff tests since the pytests will require the packages needed for the diff tests to properly unit test diff_util

…by checking if the value is numeric

…t is deleted to close log handlers. This prevents OSError: [Errno 24] Too many open files from running all pytests

…ands are equal

…not need to be present -- for unit tests and running METplus without executing commands

…ts. Instead require METPLUS_TEST_OUTPUT_BASE to be set in the user's environment to run tests. Add logic to ensure that the output base is writable by the user running the pytests or alert user before tests start to run

…es not have write permissions

…gle parameterized test

…red to run all of the tests

…ity tests that have additional dependencies that may not be available on all systems

…ction about running use case tests because they are typically run in GitHub Actions instead of locally. Use case tests can still be run manually by running a use case and writing output to 2 different directories, then comparing the results

…running unless explicitly specified