[PATCH] emacs/address: use member instead of memq to check for pair

[David Bremner]

David Bremner <david at tethera.net> writes:

> Quoting from the elisp reference:
>
>      For other types (e.g., lists, vectors, strings), two arguments
>      with the same contents or elements are not necessarily ‘eq’ to
>      each other.
>
> Thanks to "Attic Hermit" for the fix.

pushed to master