Suspicious output during apt update

[Ihor Antonov <ihor@antonovs.family>]

Today during apt update I got a very strange error message (below)
Running apt udpate did not seem to reproduce the issue.

Does anyone know what is this? And why does it tell "get haircut" ?

--------
$ sudo apt update                                                                                                                                                 
[sudo] password for ngor:

...

Fetched 14.9 MB in 4s (3,979 kB/s)
Entity: line 4: parser error : xmlParseEntityRef: no name
e original message barList of languages in a config file instead iso-codesFind &
                                                                               ^
Entity: line 8: parser error : EntityRef: expecting ';'
    - get haircut @s 24 @r d &i 14 @o r</li>
                               ^
Entity: line 11: parser error : EntityRef: expecting ';'
@r y &i 4 &M 11 &m 2, 3, 4, 5, 6, 7, 8 &w TU</li>
       ^
Entity: line 11: parser error : EntityRef: expecting ';'
@r y &i 4 &M 11 &m 2, 3, 4, 5, 6, 7, 8 &w TU</li>
            ^
Entity: line 11: parser error : EntityRef: expecting ';'
@r y &i 4 &M 11 &m 2, 3, 4, 5, 6, 7, 8 &w TU</li>
                  ^
Entity: line 11: parser error : EntityRef: expecting ';'
@r y &i 4 &M 11 &m 2, 3, 4, 5, 6, 7, 8 &w TU</li>
                                         ^
Reading package lists... Done
Building dependency tree
Reading state information... Done
12 packages can be upgraded. Run 'apt list --upgradable' to see them.

-- 
Ihor Antonov

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