Fix double allocation in typedarray-of.js

[codefrau]

Description

The current example for TypedArray.of() allocates an empty array first, before invoking the static of() method. My fix removes that unnecessary and misleading initial allocation.

Motivation

A novice user might look at the current example code and infer that they need to create a new typed array first before they can use the of() method. That is not the case. Also, simpler is better.

Additional details

I replaced

let int16array = new Int16Array();
int16array = Int16Array.of('10', '20', '30', '40', '50');

with

const int16array = Int16Array.of('10', '20', '30', '40', '50');

to avoid the unnecessary allocation of the empty array.

Related issues and pull requests

n/a

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[Josh-Cena]

LGTM, thanks!

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