bug#21695: 25.0.50; Change most occurrences of `setq' in Emacs manual to `customize-set-variable'? Really?

[Gregory Heytings]

> Please see the solution I proposed in the past few days.

The solution you proposed is not optimal I think, in particular because 
variables can also be set interactively, e.g. with M-: or C-x C-e, so 
checking that they have been set correctly after loading the init file is 
not enough.

The proposed (two lines!) patch works in all cases.  Its commit message 
was perhaps not clear enough, so I made it longer to make it (hopefully) 
crystal clear that it does TRT: there are no warnings for preloaded 
variables whose files are loaded after those variables have been setq'd.

Warn-when-custom-variable-is-wrongly-set.patch
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