36a37
> int fail_on_ambig;
61a63
>   {"fail-on-ambig", 0, &fail_on_ambig, 1}, /* fail on ambiguous grammars. */
74c76
<        [--output=outfile] grammar-file\n\n\
---
>        [--output=outfile] [--fail-on-ambig] grammar-file\n\n\