Format requirement of VEP

[hsiaoyi0504]

When reading documentation, I am a little confused about what's the exact input file expected for parseVEP:

• The file used in the test is the default VEP output format: https://github.com/uclahs-cds/package-moPepGen/blob/6744e7dd91dd8741b92314bec3ca6f4d4785992d/test/integration/test_parse_vep.py#L16

• Description here seems to imply that the input file should be tsv https://github.com/uclahs-cds/package-moPepGen/blob/6744e7dd91dd8741b92314bec3ca6f4d4785992d/docs/parse-vep.md?plain=1#L32

The major confusion is that both default VEP format and tab format (using --tab) are both tab-delimited file. https://www.ensembl.org/info/docs/tools/vep/vep_formats.html

[zhuchcn]

parseVEP only uses the first 13 columns of VEP output. --tab adds a header and several additional columns not used by moPepGen. So both with and without --tab is fine.