YYRECOVERING nit

[John P. Hartmann]

Hello,

The 2.1 documentation states: "The macro YYRECOVERING stands for an
expression that has the value 1 ...".

In fact, YYRECOVERING is a macro that takes no arguments so the
correct incantation is YYRECOVERING().  This had me confused for a
while.

Cheers,

  j.