Package: bash Version: 4.3-14+b1 Severity: wishlist File: /usr/share/man/man7/bash-builtins.7.gz
One notes there is this ancient $ man bash-builtins|tail -n 1|tr -s ' ' GNU Bash-2.05a 2001 October 29 BASH-BUILTINS(7) man page tagging along in the package. Apparently all its content is now on 'man bash' anyway, so either delete it or symlink it to the bash man page.