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> In one case it is not as easy as in the others.
> "return" must be changed in the function "pushline" in lua.c too, in the
> line
>    lua_pushfstring(L, "return %s", b+1);  /* change it to `return' */
> otherwise you can't use the "=" shortcut in the interactive interpreter.
> This seems to be the only instance in the Lua source code outside the
> definition of `luaX_tokens` where a keyword occurs hard-coded in a
> string. The hard-coding can be avoided at the cost of making lua.c
> include llex.h.

lua.c is a client of the Lua core. 'return' is hardcoded there as it
is hardcoded in any piece of Lua code.

-- Roberto