Subject: bug#20241: 25.0.50; `setq' with only one argument

From: Glenn Morris <[email-masked]>
Date: Tue, 24 Nov 2015 12:38:18 -0500

I'm assuming that any uses of this form were intentional (or even if
not intentional, were doing the right thing), rather than errors.
(I have no actual data - do you?) So making such code stop working
overnight seems too harsh to me.