warn/croak on "string" "string" auto-joins

[Robert Dewar]

Dave Korn wrote:

>   More seriously though, I don't see why there shouldn't be one, but rather
> than make coders go through and lint-markup every place where we really
> meant to concat two strings in a macro (one of which has only just been
> en-quoted), maybe the warning should just default to "off"?

I cannot imagine for a moment that anyone would countenance this
warning beingf "on" by default!
> 
>     cheers, 
>       DaveK