html_render: Highlighting is not preserving attributes on inline elements that get split up

[Mr0grog]

This diff: https://monitoring.envirodatagov.org/page/671a2a65-b716-4603-8d84-0f88eac21f59/d180ac05-0957-472b-ba8e-66a8e46ca3e9..1e0e4c85-c70b-4e6a-ad3e-3c6ee48e4d6d

appears to be causing some funky formatting because it isn't including all the correct attributes on inline elements that get broken up by the <ins>/<del> that the diff inserts.

In this example, the original content is a <p> with all its text wrapped in a nested set of <span> elements with inline style attributes. However, in the diff, <ins> elements break up those spans, and only the first set retain the attributes:

I think we just need to take care to preserve the attributes in two spots, but this definitely needs more investigation:

web-monitoring-diff/web_monitoring_diff/html_render_diff.py

Lines 1348 to 1350 in 07b5d1e

	current_content.reverse()
	for nested_tag in current_content:
	doc.append(f'<{nested_tag}>')

and:

web-monitoring-diff/web_monitoring_diff/html_render_diff.py

Lines 1626 to 1628 in 07b5d1e

	current_content.reverse()
	for nested_tag in current_content:
	group.append(f'<{nested_tag}>')