var strReversed =
"---------- Ice and Fire ------------\n
fire, in end will world the say Some
ice. in say Some
desire of tasted I've what From
fire. favor who those with hold I
\n... elided paragraph last ...\n
Frost Robert -----------------------";

function reverseString(s) {
    return s.split('\n').map(
      function (line) {
          return line.split().reverse().join(' ');
      }
    ).join('\n');
}

;reverseString('Hey you, Bub!');
;strReversed;
;reverseString(strReversed);

/*
=!EXPECTSTART!=
reverseString('Hey you, Bub!') ==> Bub! you, Hey
strReversed ==> ---------- Ice and Fire ------------

fire, in end will world the say Some
ice. in say Some
desire of tasted I've what From
fire. favor who those with hold I

... elided paragraph last ...

Frost Robert -----------------------
reverseString(strReversed) ==> ------------ Fire and Ice ----------

Some say the world will end in fire,
Some say in ice.
From what I've tasted of desire
I hold with those who favor fire.

... last paragraph elided ...

----------------------- Robert Frost
=!EXPECTEND!=
*/