The example Pascal program in the original bug report is now misclassified as Java source. This is on a new buster install as of 2019 01 19.
guest@buster:~$ file Downloads/emil23m.pas Downloads/emil23m.pas: Java source, ASCII text guest@buster:~$ file --version file-5.35 magic file from /etc/magic:/usr/share/misc/magic guest@buster:~$ -- hendrik
