[downloadnb-comparison] all ``Footnotes`` title missing in MYST downloadnb

[shlff]

Hi @mmcky , the third problem I find is that

• all MYST lectures with footnotes do not have the title Footnotes

For example, please find a screenshot for lecture 04_linear_algebra (left: RST, right: MYST):

The same issue occurs in all lectures with footnotes.

The issue occurs in the following lectures (TBD):

[mmcky]

thanks @shlff -- the visit_footnote node will need to be checked

[shlff]

Thanks @mmcky . This issue has not been solved yet.

[shlff]

This issue still exists. Also there are double square brackets for the numbering: