The files in this commit have previously contained text encoded as Windows-1252 (commonly mistaken for latin1/ISO-8859-1), in ways that present invalid UTF-8 bytes.
This commit converts the encodings to UTF-8, which resolves the encoding issues. While the whole-posts document could be argued to be intentionally Windows-1252, there was no obvious evidence that this was more than an historic legacy. The JavaScript file, however, definitely ought to be UTF-8.
Developed in https://github.com/WordPress/wordpress-develop/pull/9425
Discussed in https://core.trac.wordpress.org/ticket/63815
Props dmsnell, swisspidy.
Fixes#63815.
Built from https://develop.svn.wordpress.org/trunk@60627
git-svn-id: http://core.svn.wordpress.org/trunk@59963 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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