Hide-markdown-diff not hiding all changed #4035

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Description

The hide-markdown-diff is not hiding all changes in the final result preview, and effectively shows an inaccurate result.

My changes

Before

> _💁‍♀️ Protip: Use the minify plugin in-place of the loader to transpile your JS_
>
> The `target` option tells _esbuild_ that it can use newer JS syntax to perform better minification. If you're not using TypeScript or any syntax unsupported by Webpack, you can also leverage this as a transpilation step. It will be faster because there's less files to work on and will produce a smaller output because the polyfills will only be bundled once for the entire build instead of per file.

After

#### _💁‍♀️ Protip: Use the minify plugin in-place of the loader to transpile your JS_
The `target` option tells _esbuild_ that it can use newer JS syntax to perform better minification. If you're not using TypeScript or any syntax unsupported by Webpack, you can also leverage this as a transpilation step. It will be faster because there's less files to work on and will produce a smaller output because the polyfills will only be bundled once for the entire build instead of per file.

Screenshots

Github default preview

<img width="1031" alt="Screen Shot 2021-02-27 at 7 31 13 PM" src="https://user-images.githubusercontent.com/1075694/109404275-89134800-7932-11eb-9a2f-7f05812a9989.png">

With "View final result" toggled

<img width="1074" alt="Screen Shot 2021-02-27 at 7 31 01 PM" src="https://user-images.githubusercontent.com/1075694/109404278-89abde80-7932-11eb-8c10-e55c6a18c2d8.png">

Problems

• The "Protip: ..." is duplicated
• Spacing on the first "Protip: ..." is off
• "target" is highlighted