/usr/share/man/man1/mipsel-linux-gnu-as.1.gz is in binutils-mipsel-linux-gnu 2.26-8ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/as.1.gz
/usr/share/man/man1/as.1.gz