c.f. http://wpt.live/html/syntax/parsing/html5lib_template.html?run_type=write_single writing `<body><template>Hello</template>` character-by-character is producing five text nodes ("H", "e", "l", "l", "o"), contrary to the spec
<rdar://problem/107419942>
Minimal test: https://software.hixie.ch/utilities/js/live-dom-viewer/?saved=11633.
Created attachment 466283 [details] Reduction
Created attachment 466284 [details] Reduction
Pull request: https://github.com/WebKit/WebKit/pull/13593
Committed 263841@main (830fc5996373): <https://commits.webkit.org/263841@main> Reviewed commits have been landed. Closing PR #13593 and removing active labels.