range-diff.hon commit howto/using-merge-subtree: mention --allow-unrelated-histories (5e495f8)
   1#ifndef RANGE_DIFF_H
   2#define RANGE_DIFF_H
   3
   4#include "diff.h"
   5
   6int show_range_diff(const char *range1, const char *range2,
   7                    int creation_factor, struct diff_options *diffopt);
   8
   9#endif