[Bug]: When many footnotes are used for one reference, the display of the backlinks goes beyond the limits of the page

[Klemet]

What happened, and what did you expect to happen?

I was making a large table with a lot of references to a single footnote item (I don't know how these are called; many references to the same [^1] ).

When building the book, it displayed the backlinks to this same item on a single line that would go beyond the borders of the page, making the page scrollable to the right.

It's by no mean make-or-break issue (and I suppose its occurence will be pretty rare), but it's not very pretty. Maybe some way to wrap these backlincks on a single line would help ?

What version of Jupyter Book are you running?

1.0.3

What Operating System are you using?

Linux

Relevant log output