Code blocks

Fenced code blocks use the language identifier on the opening fence:

```ts
const greeting = 'hello';
```

Renders as:

const greeting = 'hello';

Titled code blocks

Some renderers support a title in the fence info string:

```ts title="hello.ts"
const greeting = 'hello';
```

Diffs

Highlight changed lines if your renderer supports it:

```ts
- const greeting = 'hi';
+ const greeting = 'hello';
```