levenshtein.hon commit tests: use "test_cmp", not "diff", when verifying the result (4fdf71b)
   1#ifndef LEVENSHTEIN_H
   2#define LEVENSHTEIN_H
   3
   4int levenshtein(const char *string1, const char *string2,
   5        int swap_penalty, int substitution_penalty,
   6        int insertion_penalty, int deletion_penalty);
   7
   8#endif