INVALID_DOMAIN_TLD error seems wrong

[martinthomson]

I get the following message:

 5  Warning
 └- Code - INVALID_DOMAIN_TLD
 └- Desc - Domain has an invalid TLD.
 └- Text - limit.states
 └- Ref  - https://www.iana.org/domains/root/db
 └- Path - rfc.middle.section[7].t[0].#text

The element in question (rfc.middle.section[7].t[0]) is:

      <t>The modification of packets provides endpoints proof that a network element is
in a position to drop datagrams and thereby enforce the indicated rate limit.
<xref target="extra-packets"/> states that endpoints only accept signals if the datagram
contains a packet that it accepts to prevent an off-path attacker from inserting
spurious rate limit signals.</t>

I think that the code for this rule is picking up "limit.\n<xref target="extra-packets"/> states" as a domain name. I don't think that's right.