Update flip.md

updated formatting

snippets/flip.md

@@ -5,14 +5,14 @@ Flip takes a function as an argument, then makes the first argument the last
 Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
 
 ```js
-const flip = fn => (...args) => fn( args.pop(), ...args )
+const flip = fn => (...args) => fn(args.pop(), ...args)
 /*
-var a = {name: "John Smith"}
-var b = {}
+let a = {name: 'John Smith'}
+let b = {}
 const mergeFrom = flip(Object.assign)
 let mergePerson = mergeFrom.bind(a)
 mergePerson(b) // == b
 b = {}
-Object.assign(b,a) // == b
+Object.assign(b, a) // == b
 */
 ```