chocolateboy 88941b3270 babel-node --print: don't mangle percent characters (%)
This applies the babel fix in #528 to babel-node.

before:

    $ babel-node --print --eval '"%%"'
    '%'

after:

    $ babel-node --print --eval '"%%"'
    '%%'
2015-04-05 06:26:29 +01:00
..
2015-04-04 04:39:28 +11:00