yyfprintf request

[Tys Lefering]

Hello,

Can you update the YYFPRINTF macro use to be
everywhere "YYFPRINTF (stderr, format, args)"
as is mentioned in the manual ?

Now it is:
YYFPRINTF (stderr, "\n");
But would like:
YYFPRINTF (stderr, "%s", "\n");

Then it has always at least 3 args,
file-stream, format-string and var-args.

http://www.gnu.org/software/bison/manual/bison.html#Tracing

The trace facility outputs messages with macro calls of the form
YYFPRINTF (stderr, format, args) where format and args are the usual
printf format and variadic arguments.

Only at a few places:
c.m4:  YYFPRINTF (yyoutput, ": ");
c.m4:  YYFPRINTF (yyoutput, ")");
glr.c:        YYFPRINTF (stderr, "\n");                                       \
glr.c:    YYFPRINTF (stderr, "\n");
glr.c:        YYFPRINTF (stderr, " (unresolved)");
glr.c:      YYFPRINTF (stderr, "\n");
glr.c:  YYFPRINTF (stderr, "Ambiguity detected.\n");
glr.c:  YYFPRINTF (stderr, "Option 1,\n");
glr.c:  YYFPRINTF (stderr, "\nOption 2,\n");
glr.c:  YYFPRINTF (stderr, "\n");
glr.c:      YYFPRINTF (stderr, " -> ");
glr.c:    YYFPRINTF (stderr, "<null>");
glr.c:  YYFPRINTF (stderr, "\n");
glr.c:      YYFPRINTF (stderr, "\n");
glr.c:  YYFPRINTF (stderr, "Tops:");
glr.c:  YYFPRINTF (stderr, "\n");                                 \
yacc.c:      YYFPRINTF (stderr, "\n");                                          
  \
yacc.c:  YYFPRINTF (stderr, "Stack now");
yacc.c:  YYFPRINTF (stderr, "\n");
yacc.c:  YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
yacc.c:      YYFPRINTF (stderr, "\n");
yacc.c:        YYFPRINTF (stderr, "LAC: initial context discarded due
to "      \
yacc.c:        YYFPRINTF (stderr, "No expected tokens.\n");