Skip "New" paragraph when scanning definitions to make link titles

[kfranqueiro]

Fixes #3511.

The WCAG 2.2 guidelines include markup to denote new additions, consisting of an extra paragraph above the actual content. They also include a ReSpec post-processing script that adds titles to definition links based on the first child element of the next sibling after the definition term. Together, these two create a problem.

This change revises the logic used by the post-process script to skip the extra paragraph denoting "New" definitions (which it was previously exclusively using).

Note this same issue would technically exist in 2.1, but we do not use the "New" annotation anywhere in that version.

I diffed a ReSpec export before/after and only the title attributes for terms whose definitions include the "New" paragraph are affected.

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[patrickhlauke]

great stuff. as a test/preview, go to https://deploy-preview-4857--wcag2.netlify.app/guidelines/#accessible-authentication-minimum and check the title of "cognitive function test" - then go to https://deploy-preview-4857--wcag2.netlify.app/guidelines/#dfn-cognitive-function-test and note that there's a "NEW" at the start of it. the latter isn't included in the former anymore.

[bruce-usab]

Concurrence on TF call 1/16. TF facilitators to discuss disposition (which column) on next coordination call.

[patrickhlauke]

Note: while this will be included in the list of fixes under errata, this is essentially a bug fix

[bruce-usab]

To experience the defect with published version, go to any SC using a new glossary term and inspect the title. Visually, most browsers will display the title attribute on mouse-over hover.

• cognitive function test in Accessible Authentication 3.3.8 Minimum, 3.3.9 Enhanced and A. Change Log
• dragging movement in 2.5.7 Dragging Movements
• focus indicator in 2.4.7 Focus Visible and 2.4.13 Focus Appearance
• minimum bounding box in 2.5.8 Target Size (Minimum) and definition for perimeter in glossary
• perimeter in 2.4.13 Focus Appearance