I tried using the id-utils utility to find the file, which I did but the lid output was confusing so I confirmed my results with grep.
masse@libre(remote):git/vim $ lid mailing
mailing README.txt runtime/doc/{intro,os_vms,pi_netrw,uganda}.txt runtime/tools/{efm_filter,mve}.txt
masse@libre(remote):git/vim $ vim README.txt
masse@libre(remote):git/vim $ grep mailing *
Binary file ID matches
README.txt:There are five mailing lists for Vim:
It took a little while to get this assignment done as the id-utils package wasn't in the main Arch Linux repositories, and it was named as 'idutils' instead of 'id-utils'.
After installing the id-utils package, I found the official GNU manual which explained the syntax and operations without using the 'man' utilities.
I installed mercurial through the Arch Linux repository by using the yaourt package manager wrapper. After doing that, downloading the vim repository was just a simple hg clone away.