Using shortcode code1.html within an other shortcode code2.html

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2

I would recommend going about this a different way. Here are two ideas:

(1) Pass the 2nd shortcode as the .Inner of the 1st shortcode. For example:

{{< shortcode-1 >}}
{{< shortcode-2 >}}
{{< /shortcode-1 >}}

(2) Put the 2nd shortcode logic into a partial, then call that partial from your 1st shortcode. See an example of that here.