Improve the shortcode whitespace situation

[bep]

We have had some discussion in this area, which reminded me of how it can be to get the indentation/leading whitespace for shortcodes, especially shortcodes that outputs Markdown.

Some problem areas are nested Markdown lists, code blocks that's not clode blocks...

One example.

Shortcodes:

mark1.md:

{{ .Inner }}

mark2.md:

1. Item 1
1. Item 2
1. Item 3

And then, the Markdown file:

1. List 1
    {{% mark1 %}}
    1. Item 1
    1. Item 2
        {{% mark2 %}}
    {{% /mark1 %}}
    {{% mark2 %}}

With the above I would expect something like:

What I actually get is:

Proposed solution

• If we record the leading whitespace before the shortcode when parsing the page (e.g tabs/spaces).
• And then apply that indentation to the rendered result of shortcodes without inner content (where the user will apply indentation).

[github-actions]

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