Updated examples

Removed duplicate and unnecessary examples.

snippets/truthCheckCollection.md

@@ -4,7 +4,7 @@ Checks if the predicate (second argument) is truthy on all elements of a collect
 
 Use `Array.every()` to check if each passed object has the specified property and if it returns a truthy value.
 
- ```js
+```js
 const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]);
 ```