small error in lua 5.2 beta document

[云风 <cloudwu@...>]

int lua_yieldk  (lua_State *L, int nresults, int ctx, lua_CFunction k);
Yields a coroutine.

This function should only be called as the return expression of a C
function, as follows:

--->     return lua_yield (L, nresults, i, k);

I guess it should be

   return lua_yieldk(L, n results, i, k);


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