Partial workaround for excluding section headings using the Display Macro

I found a partial workaround for excluding section headings using the Display Macro. While it doesn’t cover all use cases, it might help until XWIKI-18687 is resolved.

The workaround simply sets display: none !important; for <br>. However, this approach is only viable if there are no regular <br> sections in either the including page or the included page/sections.

Sandbox.ExcludeHeading.SomePage.WebHome

= Heading 1 =
Text for Heading 1
= Heading-2 =
Text for Heading-2

Display content of SomePage in another page

{{display reference="Sandbox.ExcludeHeading.SomePage.WebHome" 
excludeFirstHeading="true" section="HHeading1"/}}
{{display reference="Sandbox.ExcludeHeading.SomePage.WebHome" 
excludeFirstHeading="true" section="HHeading-2"/}}

Result:

1
Text for Heading 1

-2
Text for Heading-2

Fix to display content of SomePage in another page

{{html clean="false"}}
<style>
p:has(br) {
display: none !important;
}
</style>
{{/html}}
{{display reference="Sandbox.ExcludeHeading.SomePage.WebHome" 
excludeFirstHeading="true" section="HHeading1"/}}

{{html clean="false"}}
<style>
p:has(br) {
display: none !important;
}
</style>
{{/html}}
{{display reference="Sandbox.ExcludeHeading.SomePage.WebHome" 
excludeFirstHeading="true" section="HHeading-2"/}}

{{html}}<p><br>Also disappears</p>{{/html}}

Result:

Text for Heading 1
Text for Heading-2

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