RE: [External] : Warn about comparing quoted lists (etc) using `eq`

[Drew Adams]

> I'm about to push a new byte-compiler warning that finds mistakes like
> 
>   (eq x '(ho hum))
> 
> Ie, attempts to compare, by identity, literals that may not match
> anything at all: quoted lists, strings, floats etc.

The warning could perhaps remind users of `equal'.

It's likely that in at least some cases what they
really meant was (equal x '(ho hum)).  And `equal'
takes care of all types (strings etc.).