[text-spacing-trim] Implement line-end logic · web-platform-tests/wpt@05918d6

Firefox results

Results have successfully been scraped and added to staging.wpt.fyi.

Uh-oh - it looks like there are some newly-failing results when we compared the affected tests
to the latest run against the master branch.

Run	Spec
`master`	firefox-121.0.1-linux-20.04@5049a31d2a
`05918d6`	firefox-121.0.1-linux-20.04@05918d61fb

Test	`master`	`05918d6`
/FileAPI/url/sandboxed-iframe.html	35 / 39	35 / 40
/content-security-policy/inheritance/iframe-all-local-schemes-inherit-self.sub.html	6 / 6	5 / 7
/css/css-contain/content-visibility/content-visibility-auto-state-changed-removed.html	1 / 1	0 / 2
/css/css-scroll-snap/input/snap-area-overflow-boundary-viewport-covering.tentative.html	0 / 2	0 / 3
/css/cssom-view/background-change-during-smooth-scroll.html	1 / 1	0 / 2
/html/browsers/browsing-the-web/history-traversal/document-state.https.html	2 / 2	1 / 3
/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-fragment.html	2 / 5	0 / 5
/html/browsers/history/the-history-interface/traverse-during-unload.html	1 / 1	0 / 1
/html/semantics/embedded-content/bfcache/embedded-type-only.html	2 / 2	1 / 3
/html/semantics/interactive-elements/the-dialog-element/modal-dialog-blocks-mouse-events.html	1 / 1	0 / 1
/html/syntax/speculative-parsing/generated/page-load/picture-source-br-img.tentative.html	1 / 1	0 / 1

And 14 others...