Re: small patch to make a test work with upcoming autoconf

I wrote:
> One of autoconf's diagnostics changed a couple of months ago,
> and an automake test depended on the precise wording of the
> now-changed diagnostic. This change (will push shortly)
> makes the automake test work with both the old and the new wording:
...
> -  grep 'possibly undefined .*MY_ZARDOZ' output
> +  $EGREP '(possibly undefined|undefined or overquoted macro:) .*MY_ZARDOZ' output

I simplified slightly, to this:
$EGREP '(possibly undefined|undefined or overquoted) macro: .*MY_ZARDOZ' output