/usr/share/man/man1/go-6.1.gz is in gccgo-6 6.4.0-17ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/x86_64-linux-gnu-go-6.1.gz
/usr/share/man/man1/x86_64-linux-gnu-go-6.1.gz