Lets our entity handling methods work with all named HTML entities

[Sesquipedalian]

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[jdarwood007]

Is there a source this comes from to know when it needs updates? I don't think most humans could keep up with that.

[Sesquipedalian]

It won't need updates. The values came from get_html_translation_table(HTML_ENTITIES, ENT_QUOTES | ENT_HTML5), and the list of named entities for HTML5 is a fixed value that won't be updated or expanded in the future (see note at bottom of page). If it weren't for that guarantee, I would have built the regex at runtime. But since the list is immutable, we can just hard-code the regex.