Merge two files as they exist in the in-memory data structures, using
the given common ancestor as the baseline, producing a
git_merge_file_result
that reflects the merge result. The
git_merge_file_result
must be freed with git_merge_file_result_free
.
Note that this function does not reference a repository and any
configuration must be passed as git_merge_file_options
.
0 on success or error code