arXiv multi-citation groups lose all but the first reference

[MaxWolf-01]

When arXiv HTML has multiple citations in a single bracket group, only the first one is preserved.

Example

https://arxiv.org/html/1706.03762v7

The HTML has a group of three citations:

<cite class="ltx_cite ltx_citemacro_citep">[<a href="#bib.bib35" class="ltx_ref">35</a>,
<a href="#bib.bib2" class="ltx_ref">2</a>,
<a href="#bib.bib5" class="ltx_ref">5</a>]</cite>

Expected: [^35] [^2] [^5]

Actual: [^35]

[kepano]

Should be fixed in 0.10.0