Copy {{Other uses|Target (disambiguation)}} from HTML, e.g. https://en.wikipedia.org/wiki/Template:Other_uses
The paste logic detects this as non-plain text HTML (which it is) and so converts it to wikitext, so the {{ are <nowiki>'d
Reported here: https://www.mediawiki.org/w/index.php?title=Topic:Th8uf7murzbx3ttg&topic_showPostId=th8uf7mwc3rkg0j8#flow-post-th8uf7mwc3rkg0j8