[FIX] Trivial column header fix

[nicholst]

Replace underscore-separated column headers with capitalised, space-separated headers.

Just fixing some snake-case formatted column labels (modality_label & contrast_label).

[nicholst]

If matching the original label string was intentional, then I'd recommend making it 'code' text, as in modality_label instead of modality_label and contrast_label instead of contrast_label.

[chrisgorgo]

This is not a typo. Those names correspond verbatim to a placeholder name in respective file name templates. Maybe adding brackets to the header name would make it more clear.

[chrisgorgo]

If matching the original label string was intentional, then I'd recommend making it 'code' text, as in modality_label instead of modality_label and contrast_label instead of contrast_label.

Sounds good to me.

[nicholst]

Done! Now just changes the font.

[chrisgorgo]

Thanks! I think you need to fix the table width now. See https://travis-ci.com/bids-standard/bids-specification/builds/110783874#L481 and https://github.com/bids-standard/bids-specification/blob/master/CONTRIBUTING.md#writing-in-markdown

[nicholst]

Lint should be happy now.