What are the major differences between lua_pushliteral and lua_pushstring?

[孙世龙 sunshilong <sunshilong369@...>]

As per the documentation(https://www.lua.org/manual/5.3/manual.html#lua_pushliteral),
which says that: This macro is equivalent to lua_pushstring, but
should be used only when s is a literal string.

I can't understand the explanation aforementioned at all. As far as I
can see, there is no difference from the macro definition for
lua_pushliteral:

#define lua_pushliteral(L, s) lua_pushstring(L, "" s)

If there is something wrong, please let me know.
Thank you for your attention to my question.

Best regards