MWPW-176184 [MEP] Inline fragments created by MEP should not have a paragraph wrap

[vgoodric]

Detailed Description: When trying to replace a button with an inline fragment, it sometimes puts the new button on a second line.

Cause: Paragraph elements do not support a block-level element nested inside of it. But it does allow you to insert one via javascript. However, if you try to update innerHTML to have a nested paragraph in a paragraph, the browser will THEN fix the malformed HTML. The result, inline fragments can be inserted in a paragraph, but will be moved if the HTML is processed for placeholders.
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URL: https://main--cc--adobecom.aem.page/drafts/mepdev/fragments/2025/q3/buttononnewlinebug/reduced
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Steps to Reproduce:

1. Go to URL

Expected Results: buttons in yellow blade (section 2) should be side by side
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Actual Results: buttons are stacked and offset

Resolves: MWPW-NUMBER

Test URLs:

• Before: https://main--cc--adobecom.aem.page/drafts/mepdev/fragments/2025/q3/buttononnewlinebug/reduced
• After: https://main--cc--adobecom.aem.page/drafts/mepdev/fragments/2025/q3/buttononnewlinebug/reduced?milolibs=buttononnewlinebug
• https://buttononnewlinebug--milo--adobecom.aem.page/?martech=off

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed.
In case there are problems, just click a checkbox below to rerun the respective action.

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Commits

• e9b6a70 ✅ (latest)
• d3a0d20 ✅
• 8fb9758 ✅
• 616197f ✅

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/?martech=off
🖥️	/?martech=off

[jpratt2]

I approve; I used both the screenshot tool and my own visual inspection, and I found no problems resulting from this code.
Visually inspected:
https://main--cc--adobecom.aem.live/creativecloud?milolibs=buttononnewlinebug
https://main--cc--adobecom.aem.live/creativecloud/plans?milolibs=buttononnewlinebug
https://main--cc--adobecom.aem.live/creativecloud/photography?milolibs=buttononnewlinebug
https://main--cc--adobecom.aem.live/products/photoshop?milolibs=buttononnewlinebug
https://main--cc--adobecom.aem.live/products/illustrator?milolibs=buttononnewlinebug
https://main--cc--adobecom.aem.live/products/premiere?milolibs=buttononnewlinebug
https://main--cc--adobecom.aem.live/products/catalog?milolibs=buttononnewlinebug

https://main--dc--adobecom.aem.live/acrobat?milolibs=buttononnewlinebug
https://main--dc--adobecom.aem.live/acrobat/features?milolibs=buttononnewlinebug

https://main--homepage--adobecom.aem.live/homepage/index-loggedout?milolibs=buttononnewlinebug

https://main--bacom--adobecom.aem.live/?milolibs=buttononnewlinebug
https://main--bacom--adobecom.aem.live/resources/main?milolibs=buttononnewlinebug
https://main--bacom--adobecom.aem.live/products?milolibs=buttononnewlinebug

Screenshot comparison tool: https://git.corp.adobe.com/marketingtech/milolibs-screenshot-comparison