unit test coverage for _determine_output_format
unit test coverage for _determine_output_format

berquist/cclib,gaursagar/cclib,ATenderholt/cclib,berquist/cclib,langner/cclib,cclib/cclib,cclib/cclib,langner/cclib,berquist/cclib,cclib/cclib,ATenderholt/cclib,gaursagar/cclib,langner/cclib