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/rearg.md

@@ -2,7 +2,7 @@
 
 Creates a function that invokes the provided function with its arguments arranged according to the specified indexes.
 
-Use `Array.map()` to reorder arguments based on `indexes` in combination with the spread operator (`...`) to pass the transformed arguments to `fn`.
+Use `Array.prototype.map()` to reorder arguments based on `indexes` in combination with the spread operator (`...`) to pass the transformed arguments to `fn`.
 
 ```js
 const rearg = (fn, indexes) => (...args) => fn(...indexes.map(i => args[i]));