When --nth is used with a custom --delimiter, the last delimiter was
included in the search scope, forcing you to write the delimiter in
a suffix-match query. This commit removes the last delimiter from the
search scope.
# No need to write 'bar,$'
echo foo,bar,baz | fzf --delimiter , --nth 2 --filter 'bar$'
This can be seen as a breaking change, but I'm gonna say it's a bug fix.
Fix#3983