@param out_ output hex string; you say how many bytes to write.
If the number of bytes is > GIT_OID_HEXSZ, extra bytes
will be zeroed; if not, a '\0' terminator is NOT added.
@param n number of characters to write into out string
@param id oid structure to format.
@return 0 on success or error code
Format a git_oid into a partial hex string.
@param out_ output hex string; you say how many bytes to write. If the number of bytes is > GIT_OID_HEXSZ, extra bytes will be zeroed; if not, a '\0' terminator is NOT added. @param n number of characters to write into out string @param id oid structure to format. @return 0 on success or error code