renderer.code includes space at beginning of each line of code

[lucaschen]

Indented code blocks are rendering with a space at the beginning of each line. Consider the following code:

This is some text.

1. This is a list element.

	```js
	const x = 5;
	const y = x + 5;
	```

This will render with a single space before both lines of code. The problem persists regardless of whether spaces or tabs are used for indentation.

I tried doing a log inside of renderer.code like so:

const renderer = new marked.Renderer();

renderer.code = (code, language) => {
  console.log(code);
}

In code, I can see a space before each line.

[UziTech]

This should be fixed in #1645