Typo: macro example code doesn't use its parameter

[RaycatWhoDat]

Expected behavior

str should be used instead of the string literal 'hello'.

Workaround

This works as intended if you write it with the parameter. This is just a typo.

##[[
-- create a macro that injects a custom node when called
local function print_macro(str)
  local node = aster.Call{{aster.String{str}}, aster.Id{"print"}}
  -- inject the node where this macro is being called from
  inject_astnode(node)
end
]]

## print_macro('hello (again)')

Output:

print('hello (again)')

[edubart]

Fixed.