bug#14356: 24.3; Symbol's value as variable is void: help-xref-following

[Katsumi Yamaoka]

Dmitry Gutov wrote:
> Looks like a problem with a third-party package. Someone let-binds
> `help-xref-following' somewhere.

> Here's an old commit in auto-complete fixing that:

> https://github.com/auto-complete/auto-complete/commit/75482c79c5d1a46f9097cc27b568aa66ef0add07

Sorry, I am at least one of the culprits.  I've committed a fix
to gnus-art.el in the trunk.  Please reopen this bug thread if
it doesn't solve the problem.