KnpLabs/KnpPaginatorBundle — comment on commit 66d80b24d52e17558ab69936edbcabdd89fee93e
File: Pagination/SlidingPagination.php line 113
By l3pp4rd:

yes it is correct, it needs to change the direction on the sortable link, since next click will sort in reverse mode
and regarding the class, it is also reverse of reversed mode :) since it is a currently shown one