This was noted on fr.wiki, see the infobox while in VEdit mode at https://fr.wikipedia.org/w/index.php?title=Archosauria&veaction=edit .
I discussed this with Roan on IRC and he provided a simpler testcase at https://fr.wikipedia.org/wiki/Utilisateur:Roan_Kattouw_(WMF)/sandbox (compare read mode and VE mode there).
Excerpts from our conversation:
R: OK http://parsoid-lb.eqiad.wikimedia.org/frwiki/Archosauria?oldid=109663868 shows the same, so it's a Parsoid bug
<td><span class<span typeof="mw:Nowiki" data-parsoid="{}">=</span>"normal"><a rel="mw:WikiLink" href="./Animalia" title="Animalia" >Animalia</a></td>
The = is surrounded with <nowiki> and maybe that's why Parsoid is tripping
Oh the <nowiki>=</nowiki> comes from {{=}}