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

[Janis Johnson]

On Thu, Aug 19, 2004 at 07:20:00PM +0200, Kai Henningsen wrote:
> Without intervening line feed is pretty much the *only* way I use  
> automatic concatenation. I can't immediately think of a single good reason  
> to use it *with* intervening line feed ...

GCC itself is full of things like

  fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_);

where HOST_WIDE_INT_PRINT_DEC is a string literal.

Janis