easy color-coded diffs, using google's diff/match/patch
npm install coffeenode-diff
example:
console.log DIFF.analyze "this is some test. blah blah blah", "this is other text. blah blah blah"
[ [ 0, "this is " ]
[ -1, "some" ]
[ 1, "other" ]
[ 0, " te" ]
[ -1, "s" ]
[ 1, "x" ]
[ 0, "t. blah blah blah" ] ]
console.log DIFF.colorize "this is some test. blah blah blah", "this is other text. blah blah blah"