removed double-quoting from a Bison diagnostic

[Paul Eggert]

I installed this:

2005-07-22  Paul Eggert  <address@hidden>

        * src/scan-gram.l (<SC_PRE_CODE>.): Don't double-quote token names,
        now that token names are already quoted.

--- scan-gram.l.~1.74.~ 2005-07-19 09:13:16.000000000 -0700
+++ scan-gram.l 2005-07-22 09:38:01.000000000 -0700
@@ -549,7 +549,7 @@ splice       (\\[ \f\t\v]*\n)*
       }
     else
       {
-       complain_at (*loc, _("missing `{' in `%s'"),
+       complain_at (*loc, _("missing `{' in %s"),
                     token_name (token_type));
        obstack_sgrow (&obstack_for_string, "{}");
        STRING_FINISH;