Example use case:
bookofhexxy.welcome.content: "The $(l:{hex_book_url})Hex Casting book/$ can be viewed here, with content from several $(l:https://pypi.org/project/hexdoc/)hexdoc/$-compatible addons."
{# current workaround (produces a warning message) #}
{{ fmt.styled(_f(
_("bookofhexxy.welcome.content").format(hex_book_url=hex_book_url)
)) }}
{# with this feature #}
{{ fmt.styled(hexdoc_format(
_("bookofhexxy.welcome.content").format(hex_book_url=hex_book_url)
)) }}