Avoid confusing prototype methods for static methods

Correct: `Array.from()` (it’s a static method)
Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method)

This patch uses the common `#` syntax to denote `.prototype.`.

snippets/nest.md

@@ -3,9 +3,9 @@
 Given a flat array of objects linked to one another, it will nest them recursively.
 Useful for nesting comments, such as the ones on reddit.com.
 
-Use recursion. 
-Use `Array.filter()` to filter the items where the `id` matches the `link`, then `Array.map()` to map each one to a new object that has a `children` property which recursively nests the items based on which ones are children of the current item. 
-Omit the second argument, `id`, to default to `null` which indicates the object is not linked to another one (i.e. it is a top level object). 
+Use recursion.
+Use `Array.prototype.filter()` to filter the items where the `id` matches the `link`, then `Array.prototype.map()` to map each one to a new object that has a `children` property which recursively nests the items based on which ones are children of the current item.
+Omit the second argument, `id`, to default to `null` which indicates the object is not linked to another one (i.e. it is a top level object).
 Omit the third argument, `link`, to use `'parent_id'` as the default property which links the object to another one by its `id`.
 
 ```js