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/compact.md

@@ -2,7 +2,7 @@
 
 Removes falsey values from an array.
 
-Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
+Use `Array.prototype.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
 
 ```js
 const compact = arr => arr.filter(Boolean);