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**Improvements**
- Updates format of ``~mwtab.mwtab.validate_file()`` validation log generated during validation.
- Includes metadata header in validation logs containing; datetime, mwtab version, file source, study id, analysis
id, and file format.
- Minor changes to error messages for MS(NMR)_METABOLITE_DATA, NMR_BINNED_DATA, and SUBJECT_SAMPLE_FACTORS sections.
**Bugfixes**
- Fixes error where pytests for ``~mwtab.mwtab.validate_file()`` method were repeatedly using the same text files for
validation rather than both the test text and JSON files.
- Verbose file validation enabled in commandline.
- Default value given to ``base_url`` parameter in ``~mwtab.mwatb._pull_study_analysis()`` methods.