Erlang Language iolists Add the allowed data types to the front of an IO list, creating a new one.
Example
["Guten Tag " | [<<"Hello">>]].
[<<"Guten Tag ">> | [<<"Hello">>]].
[$G, $u, $t, $e, $n , $T, $a, $g | [<<"Hello">>]].
[71,117,116,101,110,84,97,103,<<"Hello">>].
