Create a new mailmap instance containing a single mailmap file
@param out_ pointer to store the new mailmap @param buf buffer to parse the mailmap from @param len the length of the input buffer @return 0 on success, or an error code
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Create a new mailmap instance containing a single mailmap file
@param out_ pointer to store the new mailmap @param buf buffer to parse the mailmap from @param len the length of the input buffer @return 0 on success, or an error code