See the article https://eo.wikipedia.org/w/index.php?title=Drino&oldid=5604954 .
In the end of the first paragraph after the Greek word there is a yellow tail, which probably comes from the segment highlighting on Special:CX. This highlighting is only supposed to be seen as a visual aid and never published.
The article also has <div> tags instead of usual wiki syntax paragraph breaks, and these issues may be related.