Last test

For #mentions:

@matt@write.as @matt9248@socialhome.network @matt@writing.exchange @matt@pleroma.site @bear@pixelfed.social @baer@prismo.xyz @bear@open.audio @writeas@video.writeas.org @dev@microblog.pub @writeas_devs@alpha.phereph.one

Bad mentions, shouldn't cause issues:

@who@thisdomain.doesnt.exist @somethinginvalid@matt.writefreely.dev


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